全文获取类型
收费全文 | 21309篇 |
免费 | 305篇 |
国内免费 | 19篇 |
专业分类
教育 | 14820篇 |
科学研究 | 2543篇 |
各国文化 | 169篇 |
体育 | 1520篇 |
综合类 | 19篇 |
文化理论 | 217篇 |
信息传播 | 2345篇 |
出版年
2022年 | 149篇 |
2021年 | 229篇 |
2020年 | 344篇 |
2019年 | 453篇 |
2018年 | 671篇 |
2017年 | 683篇 |
2016年 | 625篇 |
2015年 | 400篇 |
2014年 | 615篇 |
2013年 | 3573篇 |
2012年 | 515篇 |
2011年 | 523篇 |
2010年 | 473篇 |
2009年 | 424篇 |
2008年 | 487篇 |
2007年 | 462篇 |
2006年 | 417篇 |
2005年 | 369篇 |
2004年 | 415篇 |
2003年 | 350篇 |
2002年 | 357篇 |
2001年 | 459篇 |
2000年 | 504篇 |
1999年 | 404篇 |
1998年 | 225篇 |
1997年 | 285篇 |
1996年 | 259篇 |
1995年 | 193篇 |
1994年 | 215篇 |
1993年 | 175篇 |
1992年 | 334篇 |
1991年 | 304篇 |
1990年 | 317篇 |
1989年 | 334篇 |
1988年 | 303篇 |
1987年 | 280篇 |
1986年 | 263篇 |
1985年 | 313篇 |
1984年 | 229篇 |
1983年 | 220篇 |
1982年 | 183篇 |
1981年 | 178篇 |
1980年 | 170篇 |
1979年 | 270篇 |
1978年 | 192篇 |
1977年 | 176篇 |
1976年 | 144篇 |
1975年 | 137篇 |
1974年 | 150篇 |
1973年 | 142篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
83.
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
84.
85.
86.
V. A. Frolova S. K. Khasenova T. Sh. Kubieva O. A. Rog 《Scientific and Technical Information Processing》2008,35(2):104-106
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
87.
88.
A. V. Suvorinov A. V. Anyutin V. S. Sokolovskaya V. I. Fedorov 《Scientific and Technical Information Processing》2008,35(2):63-67
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
89.
Long SS 《Medical reference services quarterly》1994,13(4):69-75
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
90.
Pfeiffer S 《Medical reference services quarterly》1997,16(2):23-25
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