全文获取类型
收费全文 | 32147篇 |
免费 | 414篇 |
国内免费 | 22篇 |
专业分类
教育 | 22578篇 |
科学研究 | 3101篇 |
各国文化 | 365篇 |
体育 | 2763篇 |
综合类 | 12篇 |
文化理论 | 283篇 |
信息传播 | 3481篇 |
出版年
2021年 | 281篇 |
2020年 | 439篇 |
2019年 | 654篇 |
2018年 | 861篇 |
2017年 | 844篇 |
2016年 | 810篇 |
2015年 | 498篇 |
2014年 | 699篇 |
2013年 | 6016篇 |
2012年 | 631篇 |
2011年 | 675篇 |
2010年 | 520篇 |
2009年 | 570篇 |
2008年 | 629篇 |
2007年 | 587篇 |
2006年 | 559篇 |
2005年 | 481篇 |
2004年 | 501篇 |
2003年 | 410篇 |
2002年 | 426篇 |
2001年 | 551篇 |
2000年 | 620篇 |
1999年 | 536篇 |
1998年 | 333篇 |
1997年 | 316篇 |
1996年 | 382篇 |
1995年 | 310篇 |
1994年 | 351篇 |
1993年 | 313篇 |
1992年 | 461篇 |
1991年 | 490篇 |
1990年 | 463篇 |
1989年 | 490篇 |
1988年 | 439篇 |
1987年 | 423篇 |
1986年 | 437篇 |
1985年 | 494篇 |
1984年 | 429篇 |
1983年 | 424篇 |
1982年 | 344篇 |
1981年 | 362篇 |
1980年 | 353篇 |
1979年 | 474篇 |
1978年 | 387篇 |
1977年 | 331篇 |
1976年 | 291篇 |
1975年 | 269篇 |
1974年 | 255篇 |
1973年 | 264篇 |
1971年 | 239篇 |
排序方式: 共有10000条查询结果,搜索用时 78 毫秒
131.
The Impact of Museum Purchase on the Auction Prices of Paintings 总被引:1,自引:1,他引:0
This study examines how art museumspurchasing policy influences the auction prices ofpaintings. Using a cross section of non-speculativetransactions during the period 1820–1970, we findconsiderable empirical support for the hypothesisthat public museums outside the U.S. pay above averageprices in auction markets providing higher thanaverage yields to private sellers. The typical U.S.private museums appear to be more restricted byfinancial constraints and the development of thegeneral economic conditions than their publiccounterparts. 相似文献
132.
Lambremont JA 《Medical reference services quarterly》1997,16(2):61-67
Before planning for provision of Consumer Health Information Services, the librarian and administration must anticipate the problems encountered in sharing funds, personnel, space, and materials with an existing medical or patient education library. Establishing new space within or outside the hospital, or participating in community projects which meet consumer health information needs, are important considerations for planners. This article sets forth the place of some CHI services in the hospital setting, and how they relate to other library services. Differences between hospital library support for Patient Education and for Consumer Health Information services are discussed. 相似文献
133.
134.
Colburn JL 《Medical reference services quarterly》1997,16(3):19-25
Traditionally, clippings of newspaper articles, pictures from magazines, pamphlets, charts, graphs, posters, proceedings, or copies thereof, and other miscellaneous information sources have been stored in vertical files in libraries. The practice of creating and maintaining vertical files is extremely time consuming. In a medical library, in particular, old information about diagnosis, treatment, and prognosis can quickly become incorrect, misleading, and possibly harmful. Adequately tending to the vertical files can require a librarian to create a balancing act between properly maintaining vertical files and meeting the needs of the users in other areas of the library. The maintenance of vertical files is, by nature, highly consumptive of paper and space consuming. A reasonable alternative to the traditional vertical files is the World-Wide Web. Search engines exist for locating specific information, and bookmarks and/or links which point users to particularly useful sites can be set in search software. Some methods for searching are discussed, and a variety of World-Wide Web information sources are offered. 相似文献
135.
John W. Hoopes 《Archives and Museum Informatics》1997,11(2):87-105
In the final scene of Raiders of the Lost Ark, a crate containing the object of Indiana Jones' quest is wheeled into an immense warehouse for indefinite storage and questionable research access. Unfortunately, this fate is not all that far from reality. Collections of archaeological and ethnographic materials ranging from stone axes, broken potsherds, and carved monuments to baskets, ceremonial masks, and skin canoes have been held by museums collections since the Renaissance. However, their inestimable value and unique conservation and curatorial requirements often conspire to remove them from the reach of all but the most diligent scholars. The potential of the Web to enhance the quality of research on archaeological and ethnographic collections is enormous. This paper will examine ways that one can use the Web to enhance research and improve access to a variety of materials; while there are many other resources for archaeology available on the Web, this paper focusses on museum-related sites. It will also explore the potential of the Web for innovative research strategies. Digitization of catalogs, associated documents, and images to help one locate and study collections and specific artifacts are just one approach. Others include the connection of devices to the Web, such as cameras and microscopes, the creation of virtual reference collections, and the establishment of research networks that will enhance the identification and analysis of material culture. This paper will also consider the role the Web could play in issues of cultural property, contributing to and in many ways intensifying ongoing debates of ownership, curation, conservation, and repatriation of sensitive materials. 相似文献
136.
One of the highest priorities in today's hospitals is the provision of quality care to patients. The medical librarian has an increased responsibility to furnish quality information to the medical staff. Traditional methods of reference service continue to work well, but it is increasingly important for librarians to become more directly involved in hospital quality assurance (QA) activities. Occurrence screening is one system of QA where the librarian can make a difference. 相似文献
137.
138.
139.
140.