全文获取类型
| 收费全文 | 23045篇 |
| 免费 | 329篇 |
| 国内免费 | 139篇 |
专业分类
| 教育 | 15979篇 |
| 科学研究 | 2766篇 |
| 各国文化 | 181篇 |
| 体育 | 2043篇 |
| 综合类 | 19篇 |
| 文化理论 | 220篇 |
| 信息传播 | 2305篇 |
出版年
| 2022年 | 172篇 |
| 2021年 | 227篇 |
| 2020年 | 432篇 |
| 2019年 | 652篇 |
| 2018年 | 836篇 |
| 2017年 | 824篇 |
| 2016年 | 777篇 |
| 2015年 | 510篇 |
| 2014年 | 619篇 |
| 2013年 | 4094篇 |
| 2012年 | 543篇 |
| 2011年 | 552篇 |
| 2010年 | 416篇 |
| 2009年 | 408篇 |
| 2008年 | 422篇 |
| 2007年 | 482篇 |
| 2006年 | 413篇 |
| 2005年 | 381篇 |
| 2004年 | 361篇 |
| 2003年 | 359篇 |
| 2002年 | 325篇 |
| 2001年 | 368篇 |
| 2000年 | 403篇 |
| 1999年 | 362篇 |
| 1998年 | 225篇 |
| 1997年 | 214篇 |
| 1996年 | 260篇 |
| 1995年 | 219篇 |
| 1994年 | 187篇 |
| 1993年 | 184篇 |
| 1992年 | 294篇 |
| 1991年 | 292篇 |
| 1990年 | 294篇 |
| 1989年 | 324篇 |
| 1988年 | 279篇 |
| 1987年 | 279篇 |
| 1986年 | 289篇 |
| 1985年 | 315篇 |
| 1984年 | 275篇 |
| 1983年 | 276篇 |
| 1982年 | 228篇 |
| 1981年 | 209篇 |
| 1980年 | 185篇 |
| 1979年 | 292篇 |
| 1978年 | 234篇 |
| 1977年 | 202篇 |
| 1976年 | 172篇 |
| 1975年 | 149篇 |
| 1974年 | 164篇 |
| 1973年 | 153篇 |
排序方式： 共有10000条查询结果，搜索用时 15 毫秒
81.
82.
Among the huge maze of resources available on the Internet, UnCoverWeb stands out as a valuable tool for medical libraries. This up-to-date, free-access, multidisciplinary database of periodical references is searched through an easy-to-learn graphical user interface that is a welcome improvement over the telnet version. This article reviews the basic and advanced search techniques for UnCoverWeb, as well as providing information on the document delivery functions and table of contents alerting service called Reveal. UnCover's currency is evaluated and compared with other current awareness resources. System deficiencies are discussed, with the conclusion that although UnCoverWeb lacks the sophisticated features of many commercial database search services, it is nonetheless a useful addition to the repertoire of information sources available in a library. 相似文献
83.
84.
Brazin LR 《Medical reference services quarterly》1993,12(3):13-27
This is an update of an earlier article listing directories, journal articles, and general books that aid the librarian, resident, or medical student in finding information on residency and fellowship programs. The article also gives suggestions for building a file of program catalogs related to residencies, fellowships, and clerkships and related materials. 相似文献
85.
86.
87.
88.
89.
90.
In order to assess the current status of MEDLINE training provided by schools of library science, a survey was conducted of those schools having an educational identification code issued by the National Library of Medicine. Information was gathered on such variables as the instructors' background and preparation, the course objectives and content, and the amount of on-line experience provided to students in each of eleven programs. An evaluation of these measures indicates that more opportunities to gain experience in using MEDLINE should be initiated by library schools and that current efforts should be continued and expanded. Specific recommendations for accomplishing these goals are outlined; they are addressed to health sciences librarians, library school educators, the Medical Library Association, and the National Library of Medicine. 相似文献