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   17105篇
  免费   257篇
  国内免费   54篇
教育   12702篇
科学研究   1172篇
各国文化   179篇
体育   1224篇
综合类   44篇
文化理论   78篇
信息传播   2017篇
  2021年   185篇
  2020年   238篇
  2019年   371篇
  2018年   524篇
  2017年   562篇
  2016年   511篇
  2015年   331篇
  2014年   470篇
  2013年   3452篇
  2012年   463篇
  2011年   468篇
  2010年   414篇
  2009年   405篇
  2008年   425篇
  2007年   399篇
  2006年   416篇
  2005年   371篇
  2004年   263篇
  2003年   256篇
  2002年   231篇
  2001年   377篇
  2000年   293篇
  1999年   253篇
  1998年   162篇
  1997年   156篇
  1996年   175篇
  1995年   146篇
  1994年   155篇
  1993年   135篇
  1992年   216篇
  1991年   211篇
  1990年   238篇
  1989年   218篇
  1988年   177篇
  1987年   183篇
  1986年   190篇
  1985年   177篇
  1984年   180篇
  1983年   169篇
  1982年   134篇
  1981年   137篇
  1980年   134篇
  1979年   193篇
  1978年   161篇
  1977年   122篇
  1976年   121篇
  1975年   113篇
  1974年   99篇
  1973年   106篇
  1971年   117篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
41.
42.
43.
Fielding H. Garrison's paper "The medical periodical and the scientific society" cited the Buffalo Medical Journal in the company of eminent periodicals published in Berlin, Boston, and Edinburgh. This article provides an overview of the Journal and places it in context of 19th-century medical journalism. The Journal is assessed in terms of original scientific contributions and as a source of social and local history.  相似文献   
44.
45.
This paper supplements information given in earlier papers on the UCLA MEDLARS Search Station. Four major machine problem areas in the operation of a decentralized station are identified: adjustments required to run a large information retrieval type program in an academic computing facility serving many users; handicap in running time for COBOL programs; advent of the third generation of computers with attendant preparation; and need for constant current communication among all members of a decentralized network system. Statistics are given for the initial operating period, January-May 1966: 119 search requests received, 109 formulated, and 60 fully processed. Parallel searches with other MEDLARS installations, comparisons of MEDLARS and manual Index Medicus searches, and other search activities are reported.  相似文献   
46.
Adequate research in the peripheral field of medical geography requires familiarity with the literature of medicine, geography, and other environmentally oriented fields. The pertinent literature of the two primary disciplines, as well as that of anthropology, nutrition, and human bioclimatology, is surveyed from a bibliographical point of view. A brief review of historical sources is presented, followed by a discussion of the contemporary organizations, both international and national, active in the field. Emphasis is placed on the publishing programs and projects, maps, atlases, symposia, reports, and other literature sponsored or stimulated by these organizations. Regional bibliographical surveys for East Africa, India, and the Soviet Union are also noted. Pertinent aspects of bibliographies, indexes, abstracts, library card catalogs and accession lists, and other resources are listed, with emphasis on the various subject headings and other approaches to them. Throughout, the sources of information are approached from a multidisciplinary and interdisciplinary viewpoint.  相似文献   
47.
48.
49.
Serials, one of the more complicated areas of library technical endeavors, has lacked the benefit of standards for a long time. Even now, with standards beginning to be available, the majority of institutions are not working within standard serials formats. A survey to determine the use of serials standards in libraries was conducted in 1988 by the American Library Association, Resources and Technical Services Division, Serials Section, Committee to Study Serials Standards. In the spring of 1988 a survey was sent to a group encompassing the Association of Research Libraries members, CONSER participants, United States Newspaper Program participants, Microform Project libraries, and some vendors and librarians who attended the Committee meetings on a regular basis. The survey questionnaire assessed the current level of serials standards awareness of librarians and vendors. Topics included the type of serials systems used, standards relevant to serials control and union listing and whether or not they are implemented, types and levels of training staff received in the application of standards, benefits of the standards, and areas where standards are most needed.  相似文献   
50.
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