全文获取类型
收费全文 | 7581篇 |
免费 | 113篇 |
国内免费 | 1篇 |
专业分类
管理学 | 1063篇 |
民族学 | 44篇 |
人口学 | 644篇 |
丛书文集 | 22篇 |
理论方法论 | 633篇 |
综合类 | 70篇 |
社会学 | 3218篇 |
统计学 | 2001篇 |
出版年
2023年 | 44篇 |
2021年 | 49篇 |
2020年 | 108篇 |
2019年 | 171篇 |
2018年 | 187篇 |
2017年 | 275篇 |
2016年 | 193篇 |
2015年 | 126篇 |
2014年 | 200篇 |
2013年 | 1432篇 |
2012年 | 225篇 |
2011年 | 229篇 |
2010年 | 171篇 |
2009年 | 181篇 |
2008年 | 192篇 |
2007年 | 175篇 |
2006年 | 193篇 |
2005年 | 177篇 |
2004年 | 151篇 |
2003年 | 135篇 |
2002年 | 164篇 |
2001年 | 199篇 |
2000年 | 199篇 |
1999年 | 183篇 |
1998年 | 135篇 |
1997年 | 123篇 |
1996年 | 104篇 |
1995年 | 92篇 |
1994年 | 137篇 |
1993年 | 97篇 |
1992年 | 124篇 |
1991年 | 128篇 |
1990年 | 115篇 |
1989年 | 102篇 |
1988年 | 88篇 |
1987年 | 89篇 |
1986年 | 90篇 |
1985年 | 87篇 |
1984年 | 91篇 |
1983年 | 68篇 |
1982年 | 70篇 |
1981年 | 48篇 |
1980年 | 59篇 |
1979年 | 62篇 |
1978年 | 48篇 |
1977年 | 48篇 |
1976年 | 38篇 |
1975年 | 47篇 |
1974年 | 40篇 |
1971年 | 25篇 |
排序方式: 共有7695条查询结果,搜索用时 15 毫秒
91.
"This article presents estimates of the number of undocumented aliens counted in the 1980 [U.S.] census for each state and the District of Columbia. The estimates, which indicate that 2.06 million undocumented aliens were counted in the 1980 census, are not based on individual records, but are aggregate estimates derived by a residual technique. The census count of aliens (modified somewhat to account for deficiencies in the data) is compared with estimates of the legally resident alien population based on data collected by the Immigration and Naturalization Service in January 1980." Estimates are provided "for each of the states for selected countries of birth and for age, sex, and period of entry categories.... The origins of the undocumented alien population [are described], as well as some of their demographic characteristics. Some of the implications of the numbers and distribution of undocumented aliens are also discussed." This paper was originally presented at the 1984 Annual Meeting of the Population Association of America (see Population Index, Vol. 50, No. 3, Fall 1984, p. 435). 相似文献
92.
Serious mental health problems exist within the Chinese population of the United States. This article describes one center's attempt to meet the psychiatric needs of both nonpsychotic and psychotic Chinese patients through bilingual, culturally relevant treatments. 相似文献
93.
Abstract Extract In their recent paper in this journal M. and Carol Vlassoff are to be commended for helping to remedy the dearth of empirical studies on the old-age security motive for children (and particularly sons) in rural areas of developing countries.(1) However, while the questionnaire which they applied to 357 ever-married men in a rural village in Maharashtra state in India is potentially useful, several of the conclusions they derive from it are unwarranted and, if left unquestioned, would undoubtedly have the effect of setting back the serious investigation of the effects of this motive rather than furthering it. The invalid or at least questionable inferences are taken up one at a time in the order of their appearance: 相似文献
94.
An axiom of family planning programming is the importance of culturally-appropriate communicators and motivators. Traditional midwives seem ideal for this task but few studies have been done to verify this assumption by analyzing the midwife's social role as perceived by the community. 325 married women and 81 unmarried girls from a "model village" near Shiraz were interviewed by female undergraduates. 82.5% of the women are of childbearing age; 66% married before 14 years; 33% use contraception, mostly the pill, but most want large families because they expect high child mortality rates. Most of the older women are able to assist in childbirth but none, except the village's one recognized midwife, who is considered to have divine backing, will do so except in an emergency. The midwife's activities cause her to be held in low esteem by the community because 1) she has contact with a woman's sexual parts and this fact is public; 2) she has contact with vaginal excretia which are, in Islam, polluting; and 3) she is paid for her services, which labels her as a woman "without shame". The midwife is, however, widely used since women and their husbands fear the trip to the hospital and treatment by a male doctor much more than a midwife-supervised birth. The midwife in the study village had been there only 2 years and feels that she is not fully trusted. She is not consulted on birth control at all, because women expect the pill to be dispensed by doctors and consider other methods as a matter strictly between husband and wife. The midwife's role seems to complement that of the government health authorities rather than compete. The midwife's low status and circumscribed sphere of activity, the weak respect in which her advice is held and the pattern of having only 1 recognized midwife in a village at a time make the midwife a poor agent for family planning services. Her effectiveness as an agent of social change could be improved by training her in hygienic practices of childbirth and by redefining her role-relationship with the community. Studies should be done to identify the areas where traditional birth attendants are the best family planning communicators and those where that role is best left to others. 相似文献
95.
96.
Rural household survey data in the Ludhiana district of the Indian Punjab was used to study the nature and role of remittances in rural development. Of the 1646 outmigrants from the area since 1961, the 949 women who migrated for marriage and children under 12 years old were excluded from the study. Nearly all husbands who outmigrated had sent remittances. Parents and grandparents were 2nd and 3rd most likely to remit, but their numbers were small. Education did not correlate with remittance. Distance and time since emigration did not affect remittance. The frequency and the size of remittances are discussed. Remittances to outmigrants were insignificant. The remittances from outmigrants seem to raise the incomes and the levels of living of rural households. The remittances serve the purpose of redistributing income from urban to rural areas. Remittances also widened the gap between rich and poor in the rural areas because the better-off groups were more likely to receive remittances than the poorer groups. Most of the money sent from outmigrants was spent on consumable goods, food and clothing. Only a small proportion was spent on productive investment. This was usually done by farming families who invested in land or farm necessities. It is concluded that remittances from outmigrants can have a positive effect on the rural economies. Investment opportunities for nonagricultural families must be provided. 相似文献
97.
Contrary to the impression left by historians, neither welfare expansion nor welfare reform died in the 1950s. Even conservatives believed in the necessity of federal spending for welfare. Disagreements came over the proper ways to spend federal money. The Eisenhower administration propagated a rehabilitation approach in an attempt to use federal money to end individual, state, and local dependence on the federal government. The administration's 1954 social security and vocational rehabilitation laws reflected this approach. Bureaucrats in the Department of Health, Education, and Welfare, working with a Democratic Congress, managed to extend the 1954 laws into a major expansion of federal power, as the passage of disability insurance in 1956 demonstrated. Institutional continuity, not heroic individual effort, provided the dynamic for welfare reform in the 1950s. 相似文献
98.
99.
100.
Recent patterns of Hispanic immigration to the United States are examined using data from the U.S. Immigration and Naturalization Service. "From 1960 to 1978 Hispanic immigration increased significantly, reflecting the general acceleration in total immigration to the United States. Demographic trends reveal that Hispanic immigrants are increasingly working-age women. Their occupation composition is primarily blue collar, with operatives emerging as the predominant job category during the 1970s." The authors note that these immigrants settle primarily in a small number of urban centers of Hispanic population and culture in the United States, and thus the effects of immigration will be concentrated on the low-skill segment of particular urban labor markets that already contain large numbers of Hispanic workers. 相似文献