全文获取类型
收费全文 | 3388篇 |
免费 | 119篇 |
专业分类
3507篇 |
出版年
2020年 | 45篇 |
2019年 | 59篇 |
2018年 | 77篇 |
2017年 | 76篇 |
2016年 | 94篇 |
2015年 | 69篇 |
2014年 | 59篇 |
2013年 | 1097篇 |
2012年 | 75篇 |
2011年 | 88篇 |
2010年 | 76篇 |
2009年 | 75篇 |
2008年 | 75篇 |
2007年 | 56篇 |
2006年 | 59篇 |
2005年 | 40篇 |
2004年 | 36篇 |
2003年 | 31篇 |
2002年 | 45篇 |
2001年 | 50篇 |
2000年 | 29篇 |
1999年 | 43篇 |
1998年 | 22篇 |
1997年 | 31篇 |
1996年 | 26篇 |
1995年 | 22篇 |
1994年 | 38篇 |
1993年 | 32篇 |
1992年 | 34篇 |
1991年 | 21篇 |
1990年 | 32篇 |
1989年 | 28篇 |
1988年 | 30篇 |
1987年 | 32篇 |
1986年 | 30篇 |
1985年 | 33篇 |
1984年 | 52篇 |
1983年 | 54篇 |
1982年 | 47篇 |
1981年 | 38篇 |
1980年 | 34篇 |
1979年 | 41篇 |
1978年 | 42篇 |
1977年 | 30篇 |
1976年 | 32篇 |
1975年 | 34篇 |
1973年 | 27篇 |
1972年 | 31篇 |
1971年 | 21篇 |
1970年 | 32篇 |
排序方式: 共有3507条查询结果,搜索用时 0 毫秒
111.
"Accommodation of a multi-ethnic population within the territory of a single state has been recognized as a world-wide problem. Within such a society language maintenance is frequently the avenue through which cultural groups seek to preserve their identity. This paper describes and evaluates the Canadian experience of language planning by concentrating on the bilingual district, the key spatial instrument in the federal Official Languages Act. The paper argues for a cautious and spatially varied application of the 1969 Act and seeks to suggest ways in which a geolinguistic analysis may further our understanding of plurilingual societies." 相似文献
112.
113.
114.
Leon H. Ginsberg 《政策研究杂志》1982,10(3):581-591
Research findings aye useful in interpreting the widely misunderstood services of public welfare departments to the public. This article describes three research projects that were conducted and publicized by a state welfare department primarily to clarify public understanding of welfare programs. The three projects examined the characteristics of a special allowance given families to purchase school clothing for their children, the rate of turnover of Aid to Families with Dependent Children cases, and the numbers of and reasons for public employees receiving assistance from a state welfare department. Strategies for dealing with the media in interpreting public welfare programs are also suggested. 相似文献
115.
This paper reports on the methodology and an application of a dialectical approach to research and development, planning. The methodology features a structured debate followed by argumentation analysis. The argumentation analysis in turn is followed by an assessment of the plausibility of the arguments. The application involved using the methodology to assess the level of funding for research and development for a transportation system that would employ advanced technology. The Dialectic Inquiry process, and specifically, the plausibility rating activity, were seen as valuable aids for policy analysis. 相似文献
116.
117.
Clarke H. P. Schneider 《Geographical analysis》1975,7(2):173-185
City dwellers occasionally must seek jobs, dwellings, or particular services or goods. Two very different ways exist by which the individual may conduct such a search. Lacking prior information, the person may elect to visit perceived possible locations until an appropriate one is found. Alternatively, an address may first be ascertained and then visited by finding a path to it. Clearly, there is a substantial difference between these two methods in terms of the amount of spatial movement they require in order to satisfy the searcher's needs. In this paper, this difference is modeled for situations that vary in terms of the density of acceptable end points of the search, as well as in characteristics of the signs of these end points, their patterns, and the level of information with which the searcher may begin. 相似文献
118.
119.
120.