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   26703篇
  免费   333篇
  国内免费   64篇
教育   18584篇
科学研究   3156篇
各国文化   252篇
体育   1956篇
综合类   46篇
文化理论   156篇
信息传播   2950篇
  2021年   273篇
  2020年   358篇
  2019年   561篇
  2018年   754篇
  2017年   767篇
  2016年   678篇
  2015年   460篇
  2014年   634篇
  2013年   5204篇
  2012年   660篇
  2011年   653篇
  2010年   573篇
  2009年   552篇
  2008年   556篇
  2007年   563篇
  2006年   546篇
  2005年   501篇
  2004年   376篇
  2003年   378篇
  2002年   354篇
  2001年   509篇
  2000年   438篇
  1999年   375篇
  1998年   234篇
  1997年   245篇
  1996年   272篇
  1995年   214篇
  1994年   247篇
  1993年   230篇
  1992年   332篇
  1991年   343篇
  1990年   360篇
  1989年   356篇
  1988年   284篇
  1987年   288篇
  1986年   332篇
  1985年   312篇
  1984年   301篇
  1983年   289篇
  1982年   211篇
  1981年   204篇
  1980年   195篇
  1979年   282篇
  1978年   240篇
  1977年   186篇
  1976年   202篇
  1975年   167篇
  1974年   180篇
  1973年   172篇
  1971年   187篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
71.
72.
Questions concerning some of the values we hold as librarians and the goals, standards, and other evaluation tools we derive from them are discussed in the context of the history of our profession and the present period of rapid change. The concepts of stable and changing paradigms and of "scientific communities" provide the foundation for consideration of how a changing conceptual framework can affect values and their application in the evaluation process. One of many possible scenarios for the future is briefly outlined to demonstrate how some traditional values may fare.  相似文献   
73.
74.
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   
75.
76.
This article reports the results of a survey of literature on measures of library effectiveness. This survey led to the formulation of six criterion concepts (accessibility, cost, user satisfaction, response time, cost/benefit ratio, and use). The advantages and disadvantages of each method of measurement are discussed. Several points which became clear during the analysis are discussed. First, there is a relative lack of concern with the rationale behind the evaluation process, although the results invariably lead to a confused interpretation when there is no clear understanding of the purpose of an evaluation. Second, the total library system is rarely considered; instead, each evaluation criterion is taken in isolation rather than as part of the whole. Third, the library's preservation function has not been considered at all.  相似文献   
77.
78.
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   
79.
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   
80.
Since a sizeable hospital must have a library, it must have a library committee. Like all hospital committees, this one is to help maintain standards of medical care and to mediate between staff and administration. Unlike others, it clusters around one elected member (the chairman) and one employee (the librarian). A dynamic librarian can, and should, influence and inspire the committee's deliberations; and must be able to depend upon the support of the physician members of the committee.  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