全文获取类型
收费全文 | 18485篇 |
免费 | 296篇 |
国内免费 | 57篇 |
专业分类
教育 | 13823篇 |
科学研究 | 1193篇 |
各国文化 | 212篇 |
体育 | 1270篇 |
综合类 | 44篇 |
文化理论 | 84篇 |
信息传播 | 2212篇 |
出版年
2022年 | 122篇 |
2021年 | 211篇 |
2020年 | 301篇 |
2019年 | 455篇 |
2018年 | 607篇 |
2017年 | 677篇 |
2016年 | 605篇 |
2015年 | 392篇 |
2014年 | 559篇 |
2013年 | 3742篇 |
2012年 | 518篇 |
2011年 | 530篇 |
2010年 | 464篇 |
2009年 | 455篇 |
2008年 | 474篇 |
2007年 | 435篇 |
2006年 | 448篇 |
2005年 | 384篇 |
2004年 | 281篇 |
2003年 | 281篇 |
2002年 | 256篇 |
2001年 | 377篇 |
2000年 | 306篇 |
1999年 | 264篇 |
1998年 | 170篇 |
1997年 | 169篇 |
1996年 | 183篇 |
1995年 | 152篇 |
1994年 | 163篇 |
1993年 | 140篇 |
1992年 | 218篇 |
1991年 | 214篇 |
1990年 | 238篇 |
1989年 | 219篇 |
1988年 | 173篇 |
1987年 | 184篇 |
1986年 | 187篇 |
1985年 | 179篇 |
1984年 | 182篇 |
1983年 | 168篇 |
1982年 | 136篇 |
1981年 | 139篇 |
1980年 | 135篇 |
1979年 | 190篇 |
1978年 | 162篇 |
1977年 | 113篇 |
1976年 | 119篇 |
1975年 | 111篇 |
1973年 | 105篇 |
1971年 | 116篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
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
52.
53.
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
54.
55.
The use of rural sites to train badly needed primary care providers requires access to sophisticated medical information not traditionally available outside of academic health centers. Medical reference librarians can play a key role in the development of primary care training sites in rural settings. Electronic information technologies, with proactive support from medical reference librarians, can provide current and detailed information without concern for distance from the health science center library. This paper discusses recent developments in technology, describes current challenges to the application of this technology in rural settings, and provides policy recommendations for medical reference librarians to enhance rural primary care training. 相似文献
56.
Spang L 《Medical reference services quarterly》1995,14(1):33-44
Devising a coherent serials retrenchment plan while maintaining quality reference service is a dilemma faced by increasing numbers of medical librarians. In 1991, the staff of the Shiffman Medical Library, Wayne State University, began to address increasing serials budget reductions that by 1994 amounted to a projected 20% maximum cut. The resulting retrenchment plan combined an ongoing serials use study, faculty and librarian reviews of cancellation lists, and systematic refinements in interlibrary cooperation and document delivery service. The Shiffman plan provides a constructive framework that can be adapted to other medical libraries facing immediate, major serials retrenchment. 相似文献
57.
In 1991, the Reference and Information Services staff of the Alfred Taubman Medical Library at the University of Michigan gathered data on the use of the reference desk, including the frequency and types of assistance requested by different user groups throughout the year. Recommendations based on the results of this study led to improved service as well as more efficient use of staff resources. 相似文献
58.
McCarthy LH 《Medical reference services quarterly》1996,15(4):63-71
59.
The purpose of the study was to identify the pattern of publication about women and AIDS in scientific journals. Bradford zones were identified in each of six databases. The study determined that journal scatter for this subset of AIDS literature differed from the scatter in the general literature; further, the information indexed in the six electronic sources demonstrated little overlap. Consequently, key journal and newsletter titles identified by this study should form the core of any collection focusing on women and AIDS. The assurance of quality patient care management demands that librarians consult multiple resources for information retrieval that can assist health care providers, patients, and caregivers to enhance quality of life as well as to provide optimum care. 相似文献
60.