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   22788篇
  免费   277篇
  国内免费   59篇
教育   16523篇
科学研究   2032篇
各国文化   187篇
体育   1498篇
综合类   51篇
文化理论   216篇
信息传播   2617篇
  2021年   200篇
  2020年   267篇
  2019年   401篇
  2018年   1189篇
  2017年   1252篇
  2016年   996篇
  2015年   421篇
  2014年   554篇
  2013年   3805篇
  2012年   603篇
  2011年   840篇
  2010年   763篇
  2009年   593篇
  2008年   663篇
  2007年   760篇
  2006年   465篇
  2005年   505篇
  2004年   434篇
  2003年   374篇
  2002年   294篇
  2001年   441篇
  2000年   362篇
  1999年   298篇
  1998年   206篇
  1997年   200篇
  1996年   211篇
  1995年   161篇
  1994年   179篇
  1993年   154篇
  1992年   250篇
  1991年   244篇
  1990年   255篇
  1989年   243篇
  1988年   204篇
  1987年   212篇
  1986年   216篇
  1985年   209篇
  1984年   211篇
  1983年   187篇
  1982年   163篇
  1981年   157篇
  1980年   147篇
  1979年   223篇
  1978年   188篇
  1977年   132篇
  1976年   133篇
  1975年   123篇
  1974年   116篇
  1973年   116篇
  1971年   133篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
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   
83.
Benchmarking is a quality improvement tool that is increasingly being applied to the health care field and to the libraries within that field. Using mostly resources assessible at no charge through the Internet, a collection of information was compiled on benchmarking and its applications. Sources could be identified in several formats including books, journals and articles, multi-media materials, and organizations.  相似文献   
84.
85.
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   
86.
Journal searching in non-MEDLINE resources on Internet Web sites   总被引:1,自引:0,他引:1  
Internet access to the medical journal literature is absorbing the attention of all relevant parties, i.e., publishers, journal vendors, librarians, commercial providers, government agencies, and end users. Journal content on the Web sites spans the range from advertising and ordering information for the print version, to table of contents and abstracts, to downloadable full text and graphics of articles. The searching parameters for systems other than MEDLINE also differ extensively with a wide variety of features and resulting retrieval. This discussion reviews a selection of providers of medical information (particularly the journal literature) on the Internet, making a comparison of what is available on Web sites and how it can be searched.  相似文献   
87.
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   
88.
89.
90.
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