全文获取类型
收费全文 | 8388篇 |
免费 | 45篇 |
国内免费 | 2篇 |
专业分类
管理学 | 430篇 |
民族学 | 185篇 |
人才学 | 17篇 |
人口学 | 612篇 |
丛书文集 | 305篇 |
教育普及 | 3篇 |
理论方法论 | 3347篇 |
现状及发展 | 2篇 |
综合类 | 892篇 |
社会学 | 2364篇 |
统计学 | 278篇 |
出版年
2021年 | 11篇 |
2020年 | 21篇 |
2019年 | 26篇 |
2018年 | 16篇 |
2017年 | 22篇 |
2016年 | 16篇 |
2015年 | 28篇 |
2014年 | 85篇 |
2013年 | 31篇 |
2012年 | 565篇 |
2011年 | 426篇 |
2010年 | 207篇 |
2009年 | 101篇 |
2008年 | 306篇 |
2007年 | 399篇 |
2006年 | 349篇 |
2005年 | 311篇 |
2004年 | 293篇 |
2003年 | 197篇 |
2002年 | 253篇 |
2001年 | 215篇 |
2000年 | 225篇 |
1999年 | 120篇 |
1998年 | 90篇 |
1997年 | 75篇 |
1996年 | 68篇 |
1995年 | 71篇 |
1994年 | 64篇 |
1993年 | 219篇 |
1992年 | 237篇 |
1991年 | 301篇 |
1990年 | 125篇 |
1989年 | 237篇 |
1988年 | 227篇 |
1987年 | 234篇 |
1986年 | 252篇 |
1985年 | 281篇 |
1984年 | 287篇 |
1983年 | 285篇 |
1982年 | 332篇 |
1981年 | 365篇 |
1980年 | 244篇 |
1979年 | 65篇 |
1978年 | 28篇 |
1977年 | 11篇 |
1975年 | 8篇 |
1973年 | 9篇 |
1971年 | 8篇 |
1967年 | 10篇 |
1959年 | 8篇 |
排序方式: 共有8435条查询结果,搜索用时 0 毫秒
161.
162.
163.
Feather J 《Evaluation and program planning》1982,5(3):209-215
This paper discusses the importance of using macro-level variables for program analysis. It is argued that three types of macro variables--cultural, economic, and demographic--provide a context for evaluation, and offer alternative explanations for the success or failure of a program. The problems of causality and availability of data are discussed. Macro variables are seen to be especially useful in "meta evaluation," and in integrating the results of specific program evaluations into general conclusions. 相似文献
164.
Burger C 《The Public relations journal》1982,38(12):13, 16-13, 17
165.
166.
Lebow J 《Evaluation and program planning》1982,5(4):349-356
This article examines pragmatic choices which must be made in conducting consumer satisfaction assessment of mental health treatment. It is argued that choices involving sample, format, and procedure for examining satisfaction may influence the results of such research, and must be considered when creating or evaluating these efforts. These choices are examined in detail. 相似文献
167.
168.
Mosk C 《Population studies》1979,33(1):19-38
Summary Studies concerning the demographic history of Tokuwara and Meiji Japan suggest that fertility rose substantially before declining during the twentieth century. Were the motivations and circumstances which held down natality during the feudal period similar to those which account for the modern fertility decline and the low birth rate obtaining in the Japan of to-day? The thesis of this paper is that the pre-modern situation was fundamentally different from the modern one. During the Tokugawa era infanticide and abortion were used, independently of parity, to eliminate weak offspring whose chances of survival were deemed poor. Desired natality generally exceeded natural fertility. With the rise of income per head during the Meiji period the population's need for these desparate practices vanished. To-day parity-specific control characterizes fertility. Parityspecific control was diffused throughout Japan in response to declining desired fertility. Desired fertility fell significantly below natural fertility sometime during the late nineteenth or early twentieth century and the wish to reduce actual fertility to the desired level stimulated the adoption of parity-specific control. The speed of decline in marital fertility was partially governed by official policies toward contraception and abortion, contraception and abortion. 相似文献
169.
Frustrated fertility: a population paradox 总被引:1,自引:0,他引:1
Mcfalls Ja J 《Population bulletin》1979,34(2):3-43
This Bulletin examines the causes of subfecundity -- the diminished ability to reproduce -- and its effect today and in the past on the fertility, or actual reproductive performance, of individuals and, hence, populations. By definition, all real populations are subfecund since all experience some degree of involuntary biological factors affecting coitus, conception, or the ability to carry a conceptus to live birth which reduces their fecundity below the estimated biological population maximum of 15 children per woman. Affecting both men and women, these factors fall into 5 categories: genetic factors such as blood group incompatibilities and inherited sickle cell anemia or diabetes; psychopathology, including psychic stress and behavioral disorders (e.g., drug and alcohol abuse); infectious diseases such as gonorrhea, malaria, tuberculosis, and postabortion infection; malnutrrition, including the chronic undernutrition of the 3rd World and the overnutrition of developed societies; and hazards posed by increasing amounts of radiation and toxic chemicals in the environment. Reducing subfecundity requires improved living conditions, avoidance of or protection from known hazards, and adoption of medical advances which now can help 40 to 60% of subfecund couples. But even in the U.S. fertility would certainly rise among the 15% of couples now estimated to be involuntarily childless and the 10% who have fewer children than they want, and among disadvantaged groups, and teenagers. 相似文献
170.