全文获取类型
收费全文 | 1563篇 |
免费 | 46篇 |
专业分类
管理学 | 89篇 |
民族学 | 10篇 |
人口学 | 140篇 |
丛书文集 | 6篇 |
理论方法论 | 185篇 |
综合类 | 9篇 |
社会学 | 1077篇 |
统计学 | 93篇 |
出版年
2023年 | 5篇 |
2021年 | 11篇 |
2020年 | 45篇 |
2019年 | 45篇 |
2018年 | 53篇 |
2017年 | 72篇 |
2016年 | 41篇 |
2015年 | 35篇 |
2014年 | 36篇 |
2013年 | 317篇 |
2012年 | 50篇 |
2011年 | 60篇 |
2010年 | 36篇 |
2009年 | 34篇 |
2008年 | 46篇 |
2007年 | 51篇 |
2006年 | 56篇 |
2005年 | 55篇 |
2004年 | 72篇 |
2003年 | 33篇 |
2002年 | 44篇 |
2001年 | 37篇 |
2000年 | 12篇 |
1999年 | 24篇 |
1998年 | 19篇 |
1997年 | 21篇 |
1996年 | 11篇 |
1995年 | 12篇 |
1994年 | 17篇 |
1993年 | 18篇 |
1992年 | 10篇 |
1991年 | 21篇 |
1990年 | 19篇 |
1989年 | 18篇 |
1988年 | 14篇 |
1987年 | 20篇 |
1986年 | 12篇 |
1985年 | 12篇 |
1984年 | 13篇 |
1983年 | 16篇 |
1982年 | 7篇 |
1981年 | 10篇 |
1980年 | 9篇 |
1978年 | 11篇 |
1977年 | 4篇 |
1976年 | 9篇 |
1975年 | 4篇 |
1974年 | 5篇 |
1973年 | 5篇 |
1971年 | 4篇 |
排序方式: 共有1609条查询结果,搜索用时 15 毫秒
201.
In 1980, the U.S. Supreme Court vacated a revised occupational standard for benzene, stating that the Occupational Safety and Health Administration (OSHA) had failed to demonstrate that significant health risks existed under the current standard. This decision has been interpreted by OSHA as requiring the consideration of quantitative risk assessments, whenever possible, in the development of regulations for occupational carcinogens. In light of this decision, the available epidemiologic evidence was used to generate a quantitative risk assessment for benzene. Uncertainties regarding the levels and lengths of benzene exposure for the studied cohorts were incorporated into the analysis. Based on the one-hit model, the assessment indicates that a working lifetime exposure to benzene at the current permissible exposure level (10 ppm) poses a substantial excess risk of death from leukemia. This report discusses the calculation of the risk estimates, the basis for relying on certain assumptions, and the inherent limitations of using epidemiologic studies to quantify cancer risks. 相似文献
202.
Donald K. Sykes Jr. MSW; LISW; CAS; BCD Mary T. Kenney RN; BSN Kimberly S. Kilpatrick MSSA; LSW 《Clinical Social Work Journal》1991,19(2):177-190
This article will review the problem of psychogenic seizures in adolescents and the impact of family therapy and individual therapy on treatment. Why particular individuals are prone to psychogenic seizures, the relationship between psychogenic seizures and family dynamics, and unresolved individual issues will be covered. The article will address a selected case, with a specific clinical paradigm for treatment. 相似文献
203.
204.
A growing body of research has begun to describe the variety and pervasiveness of community services offered by religious congregations across the United States. This study investigated the process whereby a congregation forms a new community service entity by tracing patterns in its development from formation through emancipation. Based on a sample of twenty‐three spin‐off organizations engaged in housing services in three cities (Cleveland, Pittsburgh, and St. Louis), this exploratory study found that religious congregations provided very limited forms of incubation for new entities. Although the congregations exhibited considerable involvement in governance, their inability to undertake management of daily spin‐off operations notably contributed to the eventual separation between parent and organizational offspring. 相似文献
205.
The distinctive regional and urban locational patterns of thirty-three ethnic groups in the United States are analyzed from two different perspectives. First, who are the numerically important groups in each region? Second, from the perspective of the groups themselves, where are they spatially concentrated? We hypothesize that the forces generating distinctive ethnic locational patterns are strongest at the time of the initial settlement; thus the longer a group has been present in the United States, the less geographically concentrated it will be. This is found to be true for most ethnic groups except blacks and American Indians, whose specific social and political situations explain their particular concentrations. However, the early settlement patterns still affect the ethnic makeup of various areas of the nation, even though the concentrations have diminished over time. Moreover, although the 1975–1980 patterns of internal migration (analyzed through a Markov Chain model) are tending to reduce some of the distinctive geographic concentrations in the nation, this will still not fully eliminate distinctive ethnic concentrations. Groups differ in their propensities to leave or enter each area in a way that reflects the existing ethnic compositions of the areas. Thus even with the massive level of internal migration in the nation, there is no evidence that the substantial ethnic linkage to region is disappearing. 相似文献
206.
In this review, the influence of social and work roles are incorporated into a model of retirement adjustment, along with two psychological moderators that may aid the retirement transition. These psychological resources, locus of control and retirement self-efficacy, are those behavioral predispositions that would lead one to engage in proactive strategies for mastering the role changes inherent in the retirement transition. The implications of social and work-related role changes and psychological resources for retirement planning and adjustment are discussed. 相似文献
207.
Robert F. MacKinnon Carol E. MacKinnon Mary L. Franken 《Journal of Family and Economic Issues》1984,7(2):115-126
Considerable interest exists in identifying the characteristics of families that exhibit a high level of functioning. Since family strengths may be related to family stability, it is logical to examine long-term marriages for characteristics of strong and durable relationships. The present sample consists of 116 couples divided into two groups, higher family strengths and lower family sterngths, based on an empirical measure. Differences in the qualities of these families were identified. In most respects strengths found to be important in earlier studies of younger families also discriminated within long-term marriages. However, some variables may be more important in long-term marriages, including health, sexual relations, financial matters, and personality issues. 相似文献
208.
Based on a mental health pilot project with 34 adoptive families, this paper examines the unique differences of adoptive families from other family systems. The paper defines the context of the adopted child's symptoms and the families' characteristics. The relationship between adoption and the family's structure and development are analyzed. 相似文献
209.
210.
Judith Kleinman Elinor Rosenberg Mary Whiteside 《Journal of marital and family therapy》1979,5(2):79-86
Developmental tasks common to the formation of a reconstituted family are described, particularly the continued mourning of the old family; the formation of a solid marital relationship despite the difficulties presented by past failures and the presence of children; formation of sibling alliances across family lines. A treatment case is described which illustrates one family's process of achieving these developmental tasks. 相似文献