全文获取类型
收费全文 | 18432篇 |
免费 | 228篇 |
国内免费 | 13篇 |
专业分类
教育 | 12572篇 |
科学研究 | 2193篇 |
各国文化 | 388篇 |
体育 | 1312篇 |
综合类 | 9篇 |
文化理论 | 136篇 |
信息传播 | 2063篇 |
出版年
2021年 | 195篇 |
2020年 | 268篇 |
2019年 | 377篇 |
2018年 | 531篇 |
2017年 | 543篇 |
2016年 | 510篇 |
2015年 | 318篇 |
2014年 | 478篇 |
2013年 | 3279篇 |
2012年 | 410篇 |
2011年 | 450篇 |
2010年 | 388篇 |
2009年 | 367篇 |
2008年 | 472篇 |
2007年 | 413篇 |
2006年 | 359篇 |
2005年 | 331篇 |
2004年 | 366篇 |
2003年 | 260篇 |
2002年 | 255篇 |
2001年 | 337篇 |
2000年 | 381篇 |
1999年 | 341篇 |
1998年 | 186篇 |
1997年 | 213篇 |
1996年 | 189篇 |
1995年 | 142篇 |
1994年 | 171篇 |
1993年 | 162篇 |
1992年 | 291篇 |
1991年 | 260篇 |
1990年 | 263篇 |
1989年 | 287篇 |
1988年 | 245篇 |
1987年 | 224篇 |
1986年 | 221篇 |
1985年 | 270篇 |
1984年 | 204篇 |
1983年 | 215篇 |
1982年 | 167篇 |
1981年 | 156篇 |
1980年 | 158篇 |
1979年 | 241篇 |
1978年 | 161篇 |
1977年 | 153篇 |
1976年 | 132篇 |
1975年 | 131篇 |
1974年 | 147篇 |
1973年 | 139篇 |
1971年 | 118篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
83.
84.
85.
86.
87.
Postgraduate education for medical librarians is approachable from several perspectives, including internships, certificate programs, and continuing education programs. The diverse population of medical library personnel calls for a varied yet coordinated system of postgraduate education involving the Medical Library Association, regional medical libraries, library schools, and the National Library of Medical, in addition to active participation by all librarians in the health sciences field. Basic philosophies for each of the major types of programs are discussed and recommendations for future training of health sciences librarians are provided. 相似文献
88.
This paper describes the procedures used at the Library of the College of Physicians of Philadelphia to divide its ninety-year-old dictionary card catalog. The division was necessitated by overcrowding, obsolete subject headings, and lack of a complete authority list which resulted in like materials being scattered throughout the catalog under several headings. Two catalogs were created: the historical-biographical catalog, representing all works published before 1950 and all works of historical or biographical nature; and the current catalog, containing all works published from 1950 on, excepting historical or biographical materials. The 1950- catalog was further divided into name and subject catalogs, and the subject section was revised according to MeSH. The project was completed in about two years. As a result, searching time has been much reduced, and the library is able to take advantage of the annual revisions of MeSH to update the subject catalog. 相似文献
89.
Maxfield DK 《Bulletin of the Medical Library Association》1975,63(3):345-346
90.
B Bogen 《Bulletin of the Medical Library Association》1976,64(2):224-227
A computer-generated catalog of nonprint media is described. Examples are given of four access points to the data base: (1) main entry, (2) title, (3) MeSH terms, and (4) broad subject categories. The data input procedure is summarized. The AV catalog as the basis for a union list is evaluated, and finally, the catalog in relation to certain local problems is discussed. 相似文献