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   23035篇
  免费   321篇
  国内免费   200篇
教育   16758篇
科学研究   1919篇
各国文化   198篇
体育   1736篇
综合类   323篇
文化理论   90篇
信息传播   2532篇
  2022年   179篇
  2021年   341篇
  2020年   349篇
  2019年   427篇
  2018年   575篇
  2017年   634篇
  2016年   560篇
  2015年   541篇
  2014年   808篇
  2013年   4179篇
  2012年   935篇
  2011年   915篇
  2010年   883篇
  2009年   819篇
  2008年   815篇
  2007年   735篇
  2006年   744篇
  2005年   612篇
  2004年   405篇
  2003年   354篇
  2002年   323篇
  2001年   427篇
  2000年   330篇
  1999年   285篇
  1998年   185篇
  1997年   183篇
  1996年   215篇
  1995年   234篇
  1994年   195篇
  1993年   184篇
  1992年   273篇
  1991年   262篇
  1990年   269篇
  1989年   230篇
  1988年   185篇
  1987年   191篇
  1986年   193篇
  1985年   181篇
  1984年   193篇
  1983年   174篇
  1982年   150篇
  1981年   149篇
  1980年   154篇
  1979年   242篇
  1978年   197篇
  1977年   157篇
  1976年   143篇
  1975年   131篇
  1974年   120篇
  1971年   120篇
排序方式: 共有10000条查询结果,搜索用时 234 毫秒
71.
72.
国外图书馆GIS服务及其启示   总被引:3,自引:0,他引:3  
本文评述了国内外图书馆GIS服务两种研究流派,并就其中一种研究流派的国外此类服务产生的技术背景和政策背景及其实践进行详细论述。结合我国图书馆实际,提出在我国图书馆开展GIS服务应加强政策支持、多方合作和馆员培训。  相似文献   
73.
The use of rural sites to train badly needed primary care providers requires access to sophisticated medical information not traditionally available outside of academic health centers. Medical reference librarians can play a key role in the development of primary care training sites in rural settings. Electronic information technologies, with proactive support from medical reference librarians, can provide current and detailed information without concern for distance from the health science center library. This paper discusses recent developments in technology, describes current challenges to the application of this technology in rural settings, and provides policy recommendations for medical reference librarians to enhance rural primary care training.  相似文献   
74.
Devising a coherent serials retrenchment plan while maintaining quality reference service is a dilemma faced by increasing numbers of medical librarians. In 1991, the staff of the Shiffman Medical Library, Wayne State University, began to address increasing serials budget reductions that by 1994 amounted to a projected 20% maximum cut. The resulting retrenchment plan combined an ongoing serials use study, faculty and librarian reviews of cancellation lists, and systematic refinements in interlibrary cooperation and document delivery service. The Shiffman plan provides a constructive framework that can be adapted to other medical libraries facing immediate, major serials retrenchment.  相似文献   
75.
In 1991, the Reference and Information Services staff of the Alfred Taubman Medical Library at the University of Michigan gathered data on the use of the reference desk, including the frequency and types of assistance requested by different user groups throughout the year. Recommendations based on the results of this study led to improved service as well as more efficient use of staff resources.  相似文献   
76.
77.
The purpose of the study was to identify the pattern of publication about women and AIDS in scientific journals. Bradford zones were identified in each of six databases. The study determined that journal scatter for this subset of AIDS literature differed from the scatter in the general literature; further, the information indexed in the six electronic sources demonstrated little overlap. Consequently, key journal and newsletter titles identified by this study should form the core of any collection focusing on women and AIDS. The assurance of quality patient care management demands that librarians consult multiple resources for information retrieval that can assist health care providers, patients, and caregivers to enhance quality of life as well as to provide optimum care.  相似文献   
78.
79.
Traditionally, clippings of newspaper articles, pictures from magazines, pamphlets, charts, graphs, posters, proceedings, or copies thereof, and other miscellaneous information sources have been stored in vertical files in libraries. The practice of creating and maintaining vertical files is extremely time consuming. In a medical library, in particular, old information about diagnosis, treatment, and prognosis can quickly become incorrect, misleading, and possibly harmful. Adequately tending to the vertical files can require a librarian to create a balancing act between properly maintaining vertical files and meeting the needs of the users in other areas of the library. The maintenance of vertical files is, by nature, highly consumptive of paper and space consuming. A reasonable alternative to the traditional vertical files is the World-Wide Web. Search engines exist for locating specific information, and bookmarks and/or links which point users to particularly useful sites can be set in search software. Some methods for searching are discussed, and a variety of World-Wide Web information sources are offered.  相似文献   
80.
This is an update of an earlier article listing directories, journal articles, and general books that aid the librarian, resident, or medical student in finding information on residency and fellowship programs. The article also gives suggestions for building a file of program catalogs related to residencies, fellowships, and clerkships and related materials.  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