全文获取类型
收费全文 | 20661篇 |
免费 | 244篇 |
国内免费 | 10篇 |
专业分类
教育 | 14763篇 |
科学研究 | 2093篇 |
各国文化 | 147篇 |
体育 | 1528篇 |
综合类 | 9篇 |
文化理论 | 134篇 |
信息传播 | 2241篇 |
出版年
2021年 | 162篇 |
2020年 | 229篇 |
2019年 | 385篇 |
2018年 | 525篇 |
2017年 | 513篇 |
2016年 | 472篇 |
2015年 | 294篇 |
2014年 | 397篇 |
2013年 | 3816篇 |
2012年 | 425篇 |
2011年 | 492篇 |
2010年 | 342篇 |
2009年 | 323篇 |
2008年 | 439篇 |
2007年 | 330篇 |
2006年 | 404篇 |
2005年 | 285篇 |
2004年 | 285篇 |
2003年 | 256篇 |
2002年 | 296篇 |
2001年 | 419篇 |
2000年 | 384篇 |
1999年 | 348篇 |
1998年 | 192篇 |
1997年 | 218篇 |
1996年 | 241篇 |
1995年 | 234篇 |
1994年 | 190篇 |
1993年 | 243篇 |
1992年 | 330篇 |
1991年 | 307篇 |
1990年 | 307篇 |
1989年 | 323篇 |
1988年 | 318篇 |
1987年 | 294篇 |
1986年 | 284篇 |
1985年 | 312篇 |
1984年 | 268篇 |
1983年 | 313篇 |
1982年 | 263篇 |
1981年 | 230篇 |
1980年 | 222篇 |
1979年 | 317篇 |
1978年 | 261篇 |
1977年 | 236篇 |
1976年 | 214篇 |
1975年 | 176篇 |
1974年 | 180篇 |
1973年 | 182篇 |
1971年 | 155篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
31.
32.
The National Library of Medicine has had an enormous impact on health information services all over the world. Although NLM is primarily a national institution, it has become an important international resource by responding to requests from the international community. NLM has been influential in three major ways. First, NLM has provided a model for other national and regional health information services. Second, it has been a catalyst, in that MEDLARS and other services it provides formed the nucleus of many regional networks. NLM helped such networks get started by giving advice on how to set up services and build collections and by "training the trainers" on the MEDLARS system. Third, NLM has supported national and regional operations by providing the additional training and materials needed for day-to-day service. 相似文献
33.
34.
M F Jackson 《Bulletin of the Medical Library Association》1966,54(4):325-328
A user study of the Index Medicus done at the Walter Reed Army Medical Center included responses from a group of sixty researchers, clinicians, residents, and interns. An analysis of the questionnaire shows that, while all respondents use the Index Medicus, most use it to search for a specific subject or a specific author reference. Comments received were critical of the delay from the time of journal publication until the appearance of its citation in Index Medicus. Suggestions were offered concerning the type of publication most of the respondents would prefer. 相似文献
35.
Since a sizeable hospital must have a library, it must have a library committee. Like all hospital committees, this one is to help maintain standards of medical care and to mediate between staff and administration. Unlike others, it clusters around one elected member (the chairman) and one employee (the librarian). A dynamic librarian can, and should, influence and inspire the committee's deliberations; and must be able to depend upon the support of the physician members of the committee. 相似文献
36.
37.
The current societal and professional context presents a variety of ethical challenges to decision makers. The importance of educational preparation for ethical decision-making and ethical leadership has been addressed in the literature of library and information science (LIS), among other professions. However, it can be quite difficult to measure the impact of professional ethics education on students. This article is based on an evaluation of published original research related to ethics education in disciplines supported by professional education, including education, nursing, allied health, journalism, social work, public health, engineering, and LIS. The study considers data related to research design, methodologies used, populations studied, approaches to measuring impact, levels of impact, and publication in the journal literature. Results indicate more extensive research in education and nursing as compared with other fields, a lack of baseline data gathering for comparison, a reliance on a limited number of data-gathering techniques, and a tendency toward studying alumni over current students 相似文献
38.
39.
40.