全文获取类型
收费全文 | 2711篇 |
免费 | 78篇 |
专业分类
教育 | 2195篇 |
科学研究 | 72篇 |
各国文化 | 51篇 |
体育 | 160篇 |
综合类 | 1篇 |
文化理论 | 8篇 |
信息传播 | 302篇 |
出版年
2023年 | 16篇 |
2022年 | 30篇 |
2021年 | 38篇 |
2020年 | 81篇 |
2019年 | 128篇 |
2018年 | 154篇 |
2017年 | 186篇 |
2016年 | 159篇 |
2015年 | 97篇 |
2014年 | 121篇 |
2013年 | 610篇 |
2012年 | 97篇 |
2011年 | 111篇 |
2010年 | 72篇 |
2009年 | 85篇 |
2008年 | 84篇 |
2007年 | 75篇 |
2006年 | 56篇 |
2005年 | 45篇 |
2004年 | 49篇 |
2003年 | 53篇 |
2002年 | 47篇 |
2001年 | 27篇 |
2000年 | 48篇 |
1999年 | 31篇 |
1998年 | 19篇 |
1997年 | 21篇 |
1996年 | 27篇 |
1995年 | 22篇 |
1994年 | 21篇 |
1993年 | 12篇 |
1992年 | 9篇 |
1991年 | 12篇 |
1990年 | 5篇 |
1989年 | 9篇 |
1988年 | 11篇 |
1987年 | 12篇 |
1986年 | 6篇 |
1985年 | 13篇 |
1984年 | 13篇 |
1983年 | 9篇 |
1982年 | 5篇 |
1981年 | 8篇 |
1980年 | 4篇 |
1978年 | 4篇 |
1977年 | 10篇 |
1972年 | 3篇 |
1966年 | 2篇 |
1857年 | 6篇 |
1840年 | 2篇 |
排序方式: 共有2789条查询结果,搜索用时 15 毫秒
101.
102.
The Readers' Guide to Periodical Literature has been described as a cultural barometer. It supports scholars of history and culture by providing access to ideas circulated via the mass media in earlier times, but its own coverage and indexing practices also reveal attitudes and values toward issues of the time. The Progressive Era (1900–1924) coincides with the founding and growth of the Readers' Guide. Examining how the Readers' Guide directed readers' attention to matters of sexual and reproductive health in its first quarter century demonstrates changes in social attitudes and has implications for scholarly work. The array of index terms required to locate information on this topic indicates both barriers to information access for contemporary readers as well as challenges for present-day scholars concerned with recovering information of the era. 相似文献
103.
Linda Musser Elizabeth Roberts 《Library Collections, Acquisitions, and Technical Services》2007,31(3-4):220-225
This study examined the occurrence of color in dissertations and theses produced at the Pennsylvania State University over a nine year period. Since the most common preservation method for dissertations and theses is monochromatic microfilming, traditional treatment may result in a loss of information encoded in color in these resources. Results indicate a significant increase in the use of color over the time period studied. Variations in the amount of color use by discipline were also observed. Implications related to monochromatic microfilming and recommendations for long term preservation are discussed. 相似文献
104.
105.
106.
The need to provide bibliographic access to a collection of original medical illustrations led the Library of the University of California, San Francisco, to search for a bibliographic control system and, not finding a satisfactory one, to develop one of its own, Part 1 of the report details the planning for such a development, including the need for bibliographic control of illustrations, the goals of the proposed system, design decisions and changes required, the type of system chosen, special subjects indexing needs, the required output, and staffing and budgetary needs. 相似文献
107.
This study examined the motivational profiles of elite youth athletes to determine whether individual differences in goal orientation corresponded with differential levels of imagery use. Two hundred ninety male (n = 88) and female (n = 202) young athletes (M = 16.6 years, SD = 1.48) completed the Perceptions of Success Questionnaire (POSQ, Roberts, Treasure, & Balague, 1998) to assess dispositional goal orientations and the Sport Imagery Questionnaire (Hall, Mack, Paivio, & Hausenblas, 1998) to assess frequency and function of imagery use. A two-stage cluster analysis on the POSQ scores revealed a three-cluster solution with a multivariate analysis of variance indicating significant differences among cluster groups in imagery use. Athletes in Cluster 3 (higher task/higher ego) used significantly more imagery, regardless of the function than athletes in Cluster 1 (lower task/moderate ego) or Cluster 2 (moderate task/lower ego). These findings are discussed with reference to the role of achievement motivation in influencing young athletes' behavioral investments in mental strategies. 相似文献
108.
109.
110.