全文获取类型
收费全文 | 23853篇 |
免费 | 370篇 |
国内免费 | 103篇 |
专业分类
教育 | 17053篇 |
科学研究 | 2181篇 |
各国文化 | 229篇 |
体育 | 1811篇 |
综合类 | 152篇 |
文化理论 | 115篇 |
信息传播 | 2785篇 |
出版年
2022年 | 179篇 |
2021年 | 310篇 |
2020年 | 371篇 |
2019年 | 538篇 |
2018年 | 703篇 |
2017年 | 746篇 |
2016年 | 689篇 |
2015年 | 496篇 |
2014年 | 680篇 |
2013年 | 4457篇 |
2012年 | 698篇 |
2011年 | 705篇 |
2010年 | 638篇 |
2009年 | 621篇 |
2008年 | 634篇 |
2007年 | 596篇 |
2006年 | 605篇 |
2005年 | 528篇 |
2004年 | 382篇 |
2003年 | 355篇 |
2002年 | 346篇 |
2001年 | 494篇 |
2000年 | 419篇 |
1999年 | 359篇 |
1998年 | 209篇 |
1997年 | 200篇 |
1996年 | 231篇 |
1995年 | 197篇 |
1994年 | 205篇 |
1993年 | 186篇 |
1992年 | 311篇 |
1991年 | 291篇 |
1990年 | 309篇 |
1989年 | 312篇 |
1988年 | 244篇 |
1987年 | 248篇 |
1986年 | 254篇 |
1985年 | 259篇 |
1984年 | 243篇 |
1983年 | 234篇 |
1982年 | 204篇 |
1981年 | 187篇 |
1980年 | 191篇 |
1979年 | 255篇 |
1978年 | 225篇 |
1977年 | 162篇 |
1976年 | 170篇 |
1975年 | 143篇 |
1973年 | 142篇 |
1971年 | 141篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
71.
The preliminary building program suggested in this paper makes use of outlines, graphs, charts, and lists, rather than long-winded paragraphs, to describe the needs, objectives, and philosophy of the library. It is hoped that a short, concise, but detailed, report using these methods will save time and make the report more attractive to read, thereby encouraging the many people who will need to assist in the building planning to use the report. 相似文献
72.
73.
74.
75.
Tseng SC Arcand JL Brugger JM Finn M Olson AJ Somers S 《Library resources & technical services》1990,34(2):139-157
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
76.
77.
L D Gruppen 《Bulletin of the Medical Library Association》1990,78(2):165-172
Health sciences libraries have considerable potential as resources for both formal continuing professional education, as well as the informal continuing education that results from the professional's efforts to solve problems in daily practice. While there is a growing interest in making the resources of health sciences libraries more accessible to practitioners on a routine, day-to-day basis, there also needs to be more awareness of how, when, where, and why professionals look for information in the context of practical problems. This paper reviews recent research that identifies the context in which physicians seek information and advice from external sources, the information sources that physicians access, and the factors that influence which particular sources are sought. The results indicate that physicians vary in their information needs, preferences, motivations, and strategies for seeking information. This diversity suggests that health sciences libraries, in their efforts to be more accessible, should consider "market research" to determine the needs, preferences, and use patterns of the library's targeted users. Libraries may also benefit from exploring alternative methods of improving access to their resources. 相似文献
78.
Gary Burnett Paul T. Jaeger Kim M. Thompson 《Library & information science research》2008,30(1):56-66
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
79.
80.