全文获取类型
收费全文 | 806篇 |
免费 | 33篇 |
出版年
2021年 | 5篇 |
2020年 | 9篇 |
2019年 | 15篇 |
2018年 | 32篇 |
2017年 | 36篇 |
2016年 | 36篇 |
2015年 | 24篇 |
2014年 | 16篇 |
2013年 | 228篇 |
2012年 | 21篇 |
2011年 | 19篇 |
2010年 | 24篇 |
2009年 | 17篇 |
2008年 | 21篇 |
2007年 | 16篇 |
2006年 | 11篇 |
2005年 | 12篇 |
2004年 | 18篇 |
2003年 | 17篇 |
2002年 | 14篇 |
2001年 | 15篇 |
2000年 | 17篇 |
1999年 | 8篇 |
1998年 | 17篇 |
1997年 | 6篇 |
1996年 | 5篇 |
1995年 | 10篇 |
1994年 | 8篇 |
1993年 | 10篇 |
1992年 | 6篇 |
1991年 | 4篇 |
1990年 | 7篇 |
1989年 | 3篇 |
1988年 | 4篇 |
1987年 | 8篇 |
1986年 | 3篇 |
1985年 | 9篇 |
1984年 | 8篇 |
1983年 | 12篇 |
1982年 | 10篇 |
1981年 | 6篇 |
1980年 | 4篇 |
1979年 | 9篇 |
1978年 | 9篇 |
1977年 | 12篇 |
1976年 | 5篇 |
1975年 | 9篇 |
1974年 | 3篇 |
1971年 | 6篇 |
1969年 | 4篇 |
排序方式: 共有839条查询结果,搜索用时 15 毫秒
31.
One factor that has affected state and local politics since the 1960's is the growth of public sector unionism. Conventional wisdom assumes that the “fist generation” of public unionism has been a major cause of the fiscal problems faced by many state and local governments in the 1970's. State level cross-sectional analysis (1960–71) questions this widely held assumption with respect to the impact of strike activity and collective bargaining legislation on the tax burden across the states. 相似文献
32.
33.
Alan R. H. Baker 《Journal of Historical Geography》1975,1(4):383-387
34.
35.
Alan T. Murray 《Geographical analysis》2018,50(3):207-222
Among the wide range of geographic analysis methods are service coverage models. These location analytic approaches have been invaluable for better understanding existing (and past) conditions, deriving creative plans, and developing policy for addressing associated societal problems. Increasingly sophisticated spatial information and better knowledge about interrelated mechanisms of process and behavior have made it possible to enhance coverage models, enabling more nuanced formalizations to be devised. This has proven both important and essential in many ways. Mathematical details associated with service coverage models are derived to highlight evolving capabilities. Empirical results are presented in order to illustrate the significance and substantive importance of advanced location analytics capabilities. 相似文献
36.
Scott Alan Carson 《Historical methods》2018,51(1):1-12
When traditional methods for measuring economic welfare are scarce or unreliable, heights and BMIs are now well-accepted measurements that represent biological conditions during economic development. Weight, after controlling for height, is an additional measure for current net nutrition. Little is known about how weights varied among Mexicans living in the nineteenth century American West. Between 1870 and 1920, average Mexican weight was low and remained constant. Mexican farmers had the heaviest weights, and unskilled worker weights were low. Weight of Mexican-born individuals were higher than Mexicans born in the United States at low weights but lower at high weights. For combined characteristics, weight varied the most with age, an uncontrollable characteristic, indicating that nineteenth century Mexican current net nutrition varied the most with factors over which they had no control. 相似文献
37.
The eastern African coast is known for its Swahili “stonetowns.” Archaeological study of stonetowns has overshadowed that of Swahili rural life, and how it reformulated in the context of urban transformations after a.d. 1000. To help redress that imbalance, we focus here on village research carried out in a Swahili heartland—Pemba Island, Tanzania—in the context of two archaeological projects. We feature four settlements: later 1st millennium Kimimba village and its large, trading village neighbor, Tumbe; and 2nd millennium Kaliwa village, neighbor to Chwaka stonetown. Their archaeology, contextualized within a regional landscape, allows us to say new things about the changing nature of rural life on Pemba, and to make a case for the potential of village complexity elsewhere on the Swahili coast. 相似文献
38.
Diane Lyons Jeffrey Ferguson Diana Harlow Joanna Casey 《African Archaeological Review》2018,35(4):567-595
The study presents the results of neutron activation analysis (NAA) of contemporary pottery from Tigray Regional State, northern highland Ethiopia. This is the first regional-scale study of ceramic composition of Tigray’s pottery and is part of an ethnoarchaeological study of the material and social contexts of pottery production and consumption in Tigray’s Eastern (Misraqawi), Central (Mehakelegnaw), and North-western (Semien Mi’irabawi) zones. The analysis identifies clear compositional groups with strong regional patterns, an encouraging result for the use of NAA to study Tigray’s ancient pottery trade. Significantly, the study further contributes to discussions of how mutually constituted social identities of potters and consumers affect compositional patterning in the distribution of pottery in market networks. 相似文献
39.
40.