首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   10075篇
  免费   143篇
  国内免费   11篇
教育   7074篇
科学研究   1216篇
各国文化   82篇
体育   714篇
综合类   3篇
文化理论   76篇
信息传播   1064篇
  2023年   55篇
  2022年   63篇
  2021年   133篇
  2020年   191篇
  2019年   269篇
  2018年   421篇
  2017年   381篇
  2016年   364篇
  2015年   215篇
  2014年   347篇
  2013年   1724篇
  2012年   285篇
  2011年   306篇
  2010年   272篇
  2009年   244篇
  2008年   269篇
  2007年   232篇
  2006年   215篇
  2005年   193篇
  2004年   204篇
  2003年   161篇
  2002年   155篇
  2001年   216篇
  2000年   214篇
  1999年   199篇
  1998年   110篇
  1997年   136篇
  1996年   106篇
  1995年   81篇
  1994年   95篇
  1993年   68篇
  1992年   156篇
  1991年   129篇
  1990年   118篇
  1989年   148篇
  1988年   127篇
  1987年   99篇
  1986年   111篇
  1985年   106篇
  1984年   80篇
  1983年   90篇
  1982年   61篇
  1981年   65篇
  1980年   59篇
  1979年   103篇
  1978年   64篇
  1977年   62篇
  1976年   50篇
  1974年   57篇
  1973年   51篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
21.
22.
23.
Acquiring both published and unpublished documents produced in Africa is, generally, a difficult task due to the existing poor state of bibliographic control and the publishing industry. It is even more difficult to obtain unpublished documents in a specialized area of study such as demography--a diffuse area which cuts across several disciplines. This paper discusses the problems encountered on acquisition trips to some African countries to acquire unpublished population material. To help solve the problems, the Population Association of Africa must persuade its members to send copies of their publications to population libraries and documentation centers in their individual countries for dissemination to the other users in Africa. The various organizations and institutions in Africa engaged in the teaching and research of population studies should have an agreement to exchange copies of their theses. The Economic Commission for Africa (ECA) and the Organization of African Unity (OAU) should make representations to the various African member countries on the need to disseminate the results of vital censuses and surveys conducted. Finally, the Population Information Network for Africa (POPIN-AFRICA) with its coordinating unit at the population division of ECA should ensure that all the nodes of the network have the financial and other resources to be able to acquire the relevant documents needed for their operations.  相似文献   
24.
Computers are integral to medical practice, education, and research. While medical students learn computer skills during their training, many practicing physicians do not have the same computer experience. To familiarize this group with the exciting developments in medical informatics, the Himmelfarb Health Sciences Library and Department of Computer Medicine at the George Washington University Medical Center organized a workshop "Introducing Your Office Computer!" for attending physicians. The workshop featured a short lecture/video presentation on computer applications in medicine followed by a "computer fair" of five computer applications. Eleven physicians attended the workshop. Feedback was very positive; many called later to request more detailed instructions on using the programs demonstrated. It was a valuable experience for the staff, and new bridges were built between departments and clients.  相似文献   
25.
26.
27.
28.
29.
30.
"Change" is a critical dimension of contemporary experience. Library associations are not exempt, and they change in ways similar to other organizations. According to some authorities, four phases typify the process: diagnosis, design, implementation, and incorporation. Focusing on changes in the Medical Library Association's longstanding program of continuing education, the authors utilize the "phase framework" to chart that association's movement from a management system depending primarily upon volunteers to one in which professional staff figure prominently. The historical review serves a heuristic purpose for individuals and institutions in identifying characteristic features of the change process.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号