全文获取类型
收费全文 | 22849篇 |
免费 | 280篇 |
国内免费 | 30篇 |
专业分类
教育 | 15709篇 |
科学研究 | 2738篇 |
各国文化 | 240篇 |
体育 | 1763篇 |
综合类 | 10篇 |
文化理论 | 187篇 |
信息传播 | 2512篇 |
出版年
2021年 | 186篇 |
2020年 | 289篇 |
2019年 | 403篇 |
2018年 | 519篇 |
2017年 | 537篇 |
2016年 | 525篇 |
2015年 | 346篇 |
2014年 | 486篇 |
2013年 | 4208篇 |
2012年 | 449篇 |
2011年 | 465篇 |
2010年 | 406篇 |
2009年 | 362篇 |
2008年 | 441篇 |
2007年 | 403篇 |
2006年 | 394篇 |
2005年 | 344篇 |
2004年 | 343篇 |
2003年 | 314篇 |
2002年 | 280篇 |
2001年 | 560篇 |
2000年 | 419篇 |
1999年 | 361篇 |
1998年 | 198篇 |
1997年 | 229篇 |
1996年 | 221篇 |
1995年 | 196篇 |
1994年 | 239篇 |
1993年 | 213篇 |
1992年 | 309篇 |
1991年 | 326篇 |
1990年 | 332篇 |
1989年 | 339篇 |
1988年 | 283篇 |
1987年 | 282篇 |
1986年 | 303篇 |
1985年 | 352篇 |
1984年 | 303篇 |
1983年 | 293篇 |
1982年 | 244篇 |
1981年 | 241篇 |
1980年 | 212篇 |
1979年 | 300篇 |
1978年 | 271篇 |
1977年 | 219篇 |
1976年 | 188篇 |
1975年 | 204篇 |
1974年 | 180篇 |
1973年 | 195篇 |
1971年 | 171篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
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
92.
93.
94.
Hafner AW 《Special libraries》1990,81(4):305-308
As a gatekeeper to medical literature and a critical link in the delivery of information to physicians, the librarian's role raises the issue of the librarian's professional liability. The paper suggests several ways in which liability may attach to the librarian or the librarian's employers. Although the librarian's personal risk is negligible, the physician's exposure due to ineffective library work is substantial since the courts have held that a physician must keep abreast of progress in his field. Librarians can also become associated with professional liability actions as part of a case against a physician or hospital through the legal doctrine of vicarious liability. The paper concludes by suggesting several proactive steps for health sciences librarians to pursue to insulate themselves from professional liability and to insulate physicians and institutions from vicarious liability. 相似文献
95.
We theorize about the strategic alignment of computing with organizational mission, using the Commonwealth of Pennsylvania's efforts to pursue digital government initiatives as evidence. To do this we draw on a decade (1995–2004) of changes in Pennsylvania to characterize how a state government shifts from an organizational to an enterprise perspective regarding computing. We document and analyze the strategic and operational aspects of a series of information and communications technology (ICT) planning efforts to highlight the nature and roles of strategic alignment used to achieve this transition. Findings from this analysis mark the importance of combining several approaches to strategic planning regarding the adoption and application of ICT. 相似文献
96.
97.
Governments worldwide are increasingly using Web-based business models to enhance their service delivery. Yet the concept of the business model is unexplored within the context of e-government. Drawing upon the literature on e-commerce, we develop a taxonomy for analyzing Web-based business models for e-government. Based on a systematic survey of 59 e-government Web sites in the Netherlands, our findings indicate that most of the Web sites use the content provider or direct-to-customer business models, while only a few are using novel business models. Overall, the concept of business model is appealing and useful in the public sector. Specifically it compliments research on Web site quality by analyzing and describing Web sites using atomic e-government business models and suggesting improvements by using combinations of business models. 相似文献
98.
This study explores faculty deposits in institutional repositories (IR) within selected disciplines and identifies the diverse navigational paths to IR sites from library Web site homepages. The statistical relationship between the development of an IR and the presence of a Web site dedicated to the reform of traditional scholarly communication is also explored. The implications for the development of institutional repositories are highlighted. 相似文献
99.
Our paper analyzes the conduct of German public performing arts institutions in terms of non-market decision making or public choice. Apart from consumers of performing arts managers of performing arts institutions and public donors are main agents. A manager of a performing arts institution will not assume that the number of visitors is independent of his institution's programme or the ticket prices. By the same reasoning he will regard the amount of public subsidies not as exogenous, but dependent on his own policy. If future grants depend on present and past success (however defined), this will feed back into managerial decisions, along with expectations about demand. Data for the Federal Republic of Germany serve to empirically support the theoretical argument. 相似文献
100.