首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   388篇
  免费   16篇
  2023年   4篇
  2022年   1篇
  2021年   2篇
  2020年   11篇
  2019年   18篇
  2018年   19篇
  2017年   19篇
  2016年   13篇
  2015年   11篇
  2014年   16篇
  2013年   88篇
  2012年   12篇
  2011年   16篇
  2010年   13篇
  2009年   15篇
  2008年   14篇
  2007年   19篇
  2006年   11篇
  2005年   8篇
  2004年   7篇
  2003年   12篇
  2002年   8篇
  2001年   4篇
  2000年   7篇
  1999年   2篇
  1998年   3篇
  1997年   7篇
  1996年   7篇
  1995年   4篇
  1994年   2篇
  1993年   1篇
  1992年   4篇
  1990年   4篇
  1989年   2篇
  1987年   2篇
  1986年   2篇
  1985年   2篇
  1984年   1篇
  1983年   2篇
  1982年   1篇
  1980年   1篇
  1979年   2篇
  1978年   3篇
  1977年   1篇
  1974年   2篇
  1971年   1篇
排序方式: 共有404条查询结果,搜索用时 31 毫秒
131.
132.
Creating Choice is an important collection of edited interviewswith individuals involved in the movement to secure women'saccess to birth control and abortion in western Massachusettsin the decades surrounding the Supreme Court's pivotal rulings,Griswold v. Connecticut, the 1965 decision that legalized contraceptiveuse by married couples, and Roe v. Wade, the 1973 abortion rightscase. The collection broadens the historical treatment of thismovement, introducing activists from grassroots women's organizationsand accentuating the contributions of professionals—clergy,medical practitioners, and health educators—who establishednetworks and services that made free choice possible for somewomen even before state law extended  相似文献   
133.
This paper explores the potential of stable isotope analysis to identify the approximate region of catch of cod by analysing bones from medieval settlements in northern and western Europe. It measures the δ13C and δ15N values of cod bone collagen from medieval control samples collected from sites around Arctic Norway, the North Sea, the Kattegat and the Baltic Sea. These data were considered likely to differ by region due to, for example, variation in the length of the food chain, water temperature and salinity. We find that geographical structuring is indeed evident, making it possible to identify bones from cod caught in distant waters. These results provide a new methodology for studying the growth of long-range trade in dried cod and the related expansion of fishing effort—important aspects of the development of commercialisation in medieval Europe. As a first test of the method, we analyse three collections of cod bones tentatively interpreted as imported dried fish based on a priori zooarchaeological criteria. The results tentatively suggest that cod were being transported or traded over very long distances since the end of the first millennium AD.  相似文献   
134.
New research on the odontochronological (dental growth-increment) analysis of marsupial teeth provides opportunities to estimate with more certainty the time of the year Tasmanian Aborigines inhabited sites during the late Pleistocene. Here we focus on the Bennett's wallaby (Macropus rufogriseus) as a proxy for understanding seasonal human land use patterns and occupation of four southwest Tasmanian caves. The aim of the paper is to investigate whether caves at different altitudes were occupied in alternating seasons, and determine if the ‘Patch Model’ developed to explain the archaeological variability of late Pleistocene human behavior should be modified accordingly. The data presented here support the original observations that these sites, although reflecting extreme richness, were occupied in a punctuated seasonal manner with visits probably separated by a considerable time of unknown duration.  相似文献   
135.
136.
Farmers of southwest Ethiopia are currently transplanting yams (Dioscorea cayenensis) from wild contexts to home gardens. Ethnoarchaeological study of this practice can inform considerations of agricultural origins in prehistoric times by revealing motives and opportunities that shape decisions to adopt wild-growing plants. In one part of the study area, case studies demonstrate that decisions to manipulate yams may arise mainly among individuals of a particular gender or household composition. Comparisons across the study area illustrate the effects of slight variations in environment and human mobility upon adoption of wild-growing yams. The social and environmental factors that favor or impede manipulation of yams are highly specific and nuanced, and operate on both intra- and inter-community levels.  相似文献   
137.
138.
139.
140.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号