全文获取类型
收费全文 | 24771篇 |
免费 | 429篇 |
国内免费 | 1篇 |
专业分类
管理学 | 3024篇 |
民族学 | 131篇 |
人才学 | 6篇 |
人口学 | 2380篇 |
丛书文集 | 134篇 |
教育普及 | 2篇 |
理论方法论 | 2256篇 |
现状及发展 | 1篇 |
综合类 | 320篇 |
社会学 | 12164篇 |
统计学 | 4783篇 |
出版年
2023年 | 126篇 |
2021年 | 126篇 |
2020年 | 361篇 |
2019年 | 568篇 |
2018年 | 605篇 |
2017年 | 859篇 |
2016年 | 601篇 |
2015年 | 457篇 |
2014年 | 566篇 |
2013年 | 4228篇 |
2012年 | 823篇 |
2011年 | 740篇 |
2010年 | 577篇 |
2009年 | 543篇 |
2008年 | 615篇 |
2007年 | 610篇 |
2006年 | 605篇 |
2005年 | 545篇 |
2004年 | 537篇 |
2003年 | 499篇 |
2002年 | 524篇 |
2001年 | 601篇 |
2000年 | 516篇 |
1999年 | 530篇 |
1998年 | 418篇 |
1997年 | 399篇 |
1996年 | 389篇 |
1995年 | 367篇 |
1994年 | 349篇 |
1993年 | 339篇 |
1992年 | 393篇 |
1991年 | 396篇 |
1990年 | 361篇 |
1989年 | 372篇 |
1988年 | 316篇 |
1987年 | 320篇 |
1986年 | 297篇 |
1985年 | 339篇 |
1984年 | 315篇 |
1983年 | 321篇 |
1982年 | 243篇 |
1981年 | 226篇 |
1980年 | 236篇 |
1979年 | 237篇 |
1978年 | 217篇 |
1977年 | 194篇 |
1976年 | 178篇 |
1975年 | 165篇 |
1974年 | 150篇 |
1973年 | 114篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
Luis F. B. Plascencia Gary P. Freeman Mark Setzler 《The International migration review》2003,37(1):5-23
State governments exercise significant powers to regulate the economic and social activities of resident aliens. We review the laws of the six leading states of immigrant settlement regulating access of noncitizens to 23 occupations, updating existing studies from 1946–77. Citizenship requirements for these occupations have plummeted, a change we attribute to federal court decisions, advisory opinions of state attorneys general, and state legislative and administrative action. There are numerous additional citizenship requirements in the statutes of the six states, although these appear to be poorly enforced. The authority of states to regulate their political communities is the most important remaining constitutionally valid basis of citizenship requirements. States define their political community broadly, leading to questionable exclusions of noncitizens from important activities. 相似文献
63.
Chris Dockins Robin R Jenkins Nicole Owens Nathalie B Simon Lanelle Bembenek Wiggins 《Risk analysis》2002,22(2):335-346
This article explores two problems analysts face in determining how to estimate values for children's health and safety risk reductions. The first addresses the question: Do willingness‐to‐pay estimates for health risk changes differ across children and adults and, if so, how? To answer this question, the article first examines the potential effects of age and risk preferences on willingness to pay. A summary of the literature reporting empirical evidence of differences between willingness to pay for adult health and safety risk reductions and willingness to pay for health and safety risk reductions in children is also provided. The second dimension of the problem is a more fundamental issue: Whose perspective is relevant when valuing children's health effects—society's, children's, adults‐as‐children, or parents'? Each perspective is considered, followed ultimately by the conclusion that adopting a parental perspective through an intrahousehold allocation model seems closest to meeting the needs of the estimation problem at hand. A policy example in which the choice of perspective affects the outcome of a regulatory benefit‐cost analysis rounds out the article and emphasizes the importance of perspective. 相似文献
64.
65.
In this paper, the history of atmospheric science is traced, from the earliest discussions from meteorologists, and the first meetings to describe this new research area. The development of atmospheric science proceeded in three phases with each phase being marked by the attempt to organize resources, and bring into the atmospheric science network, scientists from other fields. I argue here that this construction of a science provides evidence of the social nature of science as well as the importance of organizations to the creation of a science. 相似文献
66.
67.
I. M. Endresen B. Ellertsen C. Endresen A. M. Hjelmen R. Matre H. Ursin 《Work and stress》1991,5(3):217-227
This study concerned the immunological correlates of stress and work. Self reported stress, emotional state, ego-strength, and defensiveness were examined in relation to measures of cellular immunity (T-cell response to Con A and number of T4 and T8 cells) and humoral immunity (concentrations of immunoglobulins and complement components in plasma) in a group of 96 Norwegian female bank employees. The analyses showed that workload, the stress factor with the highest group mean, was associated with number of T-cells, while strain due to body posture during work was related to concentrations of IgM and C3. Further, depression was significantly correlated with IgM concentration and T-cell number, and anxiety with C3 concentration. T-cell activity was the immunological parameter most consistently associated with psychological well-being, showing positive correlations with defensiveness and ego-strength and negative correlations with anxiety and depression. In conclusion, T-cell number and concentrations of IgM and C3 were sensitive to both work-related stress experience and emotional distress. Coping abilities, indicated by the MMPI Ego-strength scale and emotional distress, were reflected in T-cell activity; insufficient coping was associated with low T-cell activity. 相似文献
68.
69.
70.