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   13838篇
  免费   221篇
  国内免费   11篇
教育   9617篇
科学研究   1689篇
各国文化   122篇
体育   1015篇
综合类   17篇
文化理论   165篇
信息传播   1445篇
  2022年   95篇
  2021年   140篇
  2020年   218篇
  2019年   294篇
  2018年   410篇
  2017年   450篇
  2016年   393篇
  2015年   264篇
  2014年   384篇
  2013年   2298篇
  2012年   333篇
  2011年   321篇
  2010年   310篇
  2009年   268篇
  2008年   294篇
  2007年   302篇
  2006年   280篇
  2005年   237篇
  2004年   273篇
  2003年   240篇
  2002年   246篇
  2001年   317篇
  2000年   341篇
  1999年   261篇
  1998年   142篇
  1997年   184篇
  1996年   180篇
  1995年   125篇
  1994年   134篇
  1993年   118篇
  1992年   198篇
  1991年   191篇
  1990年   219篇
  1989年   219篇
  1988年   188篇
  1987年   197篇
  1986年   173篇
  1985年   217篇
  1984年   156篇
  1983年   135篇
  1982年   126篇
  1981年   117篇
  1980年   117篇
  1979年   178篇
  1978年   135篇
  1977年   117篇
  1976年   95篇
  1975年   94篇
  1974年   96篇
  1973年   87篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
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   
52.
53.
54.
Information access is central to library and information science, yet explorations of its conceptual nature have been limited. Given the importance of information access to the discipline, there is a need for research to create a better understanding of the concept and its many roles in all activities and behaviors related to information. Drawing on the theoretical work of Elfreda Chatman, this article proposes that the study of information access can be facilitated through the recognition and examination of the physical, intellectual, and social aspects of information access. These types of access are examined through three case studies in terms of different information behaviors and contexts, with a particular focus on the importance of social access. The article also discusses the future roles that considerations of social access can play in research and theory.  相似文献   
55.
56.
57.
This paper discusses the evaluation of scientific activity with the help of some scientometric indices, in particular, a citation index. The information massif of the bibliographic database of citations to domestic publications of Kazakh authors is statistically described.  相似文献   
58.
We consider some issues of the development of the national information infrastructure in the field of innovation, including a national system of accounting for the results of scientific and technical activities (RSTA) and a national new-generation research computer network (NNGRCN). The current state of the national system of scientific and technical information and its resources for information support of innovation processes are analyzed. In the context of further development of the Commonwealth of Independent States (CIS), we propose a Conception of scientific and technical support for programs and projects of NIS member-states in the field of innovation, making it possible to incorporate the existing innovation-oriented information resources into a joint distributed integrated information system as well as to create new information resources and technologies.  相似文献   
59.
The expertise of colleagues and experience gained through professional organizations is an overlooked resource for adding value to reference service. Collegial networks must be nurtured. They deserve the support and investment of the institution.  相似文献   
60.
AAMC STAT is a new, weekly electronic newsletter produced by the American Association of Medical Colleges. It provides coverage of national news related to academic medicine. This article briefly reviews the electronic publication and gives directions for subscribing to AAMC STAT.  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