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   34357篇
  免费   402篇
  国内免费   15篇
教育   25120篇
科学研究   3193篇
各国文化   219篇
体育   2232篇
综合类   13篇
文化理论   560篇
信息传播   3437篇
  2022年   171篇
  2021年   262篇
  2020年   389篇
  2019年   613篇
  2018年   2917篇
  2017年   2827篇
  2016年   2253篇
  2015年   558篇
  2014年   778篇
  2013年   4562篇
  2012年   871篇
  2011年   1377篇
  2010年   1318篇
  2009年   910篇
  2008年   1176篇
  2007年   1632篇
  2006年   495篇
  2005年   792篇
  2004年   822篇
  2003年   720篇
  2002年   483篇
  2001年   484篇
  2000年   421篇
  1999年   367篇
  1998年   204篇
  1997年   230篇
  1996年   243篇
  1995年   238篇
  1994年   184篇
  1993年   201篇
  1992年   326篇
  1991年   308篇
  1990年   303篇
  1989年   302篇
  1988年   256篇
  1987年   302篇
  1986年   267篇
  1985年   306篇
  1984年   247篇
  1983年   212篇
  1982年   190篇
  1981年   163篇
  1980年   156篇
  1979年   258篇
  1978年   183篇
  1977年   168篇
  1976年   155篇
  1975年   140篇
  1974年   134篇
  1971年   119篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
81.
"Change" is a critical dimension of contemporary experience. Library associations are not exempt, and they change in ways similar to other organizations. According to some authorities, four phases typify the process: diagnosis, design, implementation, and incorporation. Focusing on changes in the Medical Library Association's longstanding program of continuing education, the authors utilize the "phase framework" to chart that association's movement from a management system depending primarily upon volunteers to one in which professional staff figure prominently. The historical review serves a heuristic purpose for individuals and institutions in identifying characteristic features of the change process.  相似文献   
82.
83.
84.
The history of nursing education in America is briefly told, with the growth of education in institutions of higher learning emphasized. Two trends in nursing education are paralleled by similar developments in nursing literature. The growth of scholarship in nursing is also noted. It is pointed out that nursing is a discipline in its own right, and that training for leadership is required. Continuing education programs are mentioned, together with the increase in nursing literature. Integrated libraries for the health sciences are recommended.  相似文献   
85.
86.
A user study of the Index Medicus done at the Walter Reed Army Medical Center included responses from a group of sixty researchers, clinicians, residents, and interns. An analysis of the questionnaire shows that, while all respondents use the Index Medicus, most use it to search for a specific subject or a specific author reference. Comments received were critical of the delay from the time of journal publication until the appearance of its citation in Index Medicus. Suggestions were offered concerning the type of publication most of the respondents would prefer.  相似文献   
87.
88.
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   
89.
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   
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