全文获取类型
收费全文 | 580篇 |
免费 | 39篇 |
出版年
2022年 | 4篇 |
2021年 | 7篇 |
2020年 | 9篇 |
2019年 | 21篇 |
2018年 | 31篇 |
2017年 | 37篇 |
2016年 | 33篇 |
2015年 | 33篇 |
2014年 | 20篇 |
2013年 | 98篇 |
2012年 | 23篇 |
2011年 | 23篇 |
2010年 | 13篇 |
2009年 | 19篇 |
2008年 | 16篇 |
2007年 | 9篇 |
2006年 | 8篇 |
2005年 | 10篇 |
2004年 | 8篇 |
2003年 | 9篇 |
2002年 | 6篇 |
2001年 | 9篇 |
2000年 | 13篇 |
1999年 | 7篇 |
1998年 | 4篇 |
1997年 | 6篇 |
1996年 | 6篇 |
1995年 | 10篇 |
1993年 | 8篇 |
1992年 | 5篇 |
1991年 | 4篇 |
1990年 | 4篇 |
1986年 | 4篇 |
1980年 | 4篇 |
1977年 | 10篇 |
1976年 | 5篇 |
1975年 | 4篇 |
1972年 | 5篇 |
1971年 | 4篇 |
1970年 | 3篇 |
1969年 | 6篇 |
1968年 | 3篇 |
1967年 | 4篇 |
1966年 | 4篇 |
1965年 | 3篇 |
1964年 | 3篇 |
1961年 | 3篇 |
1960年 | 3篇 |
1959年 | 4篇 |
1950年 | 3篇 |
排序方式: 共有619条查询结果,搜索用时 15 毫秒
11.
García-Heras Manuel Agua Fernando Madiquida Hilario Fernández Víctor M. de Torres Jorge Villegas María-Ángeles Ruiz-Gálvez Marisa 《African Archaeological Review》2021,38(2):297-318
African Archaeological Review - A set of beads made of glass, gastropod mollusk shell, and fishbone from a Swahili occupation level on Ibo Island (northern Mozambique) is dated to the eleventh and... 相似文献
12.
Ricardo A. Lagos 《Development and change》1995,26(1):111-131
This article uses material from a series of case studies conducted in Latin America to analyse various aspects of the formalization of the informal sector. In particular, it examines the legal and bureaucratic barriers confronting informal sector micro-enterprises which seek to become part of the formal, legal circuit, and assesses the costs in time and money which are involved in the formalization process. The process itself is seen as consisting of two elements — achieving legality and retaining that status over time — each of which involves certain bureaucratic and financial demands. While recognizing that the requirements for formalization can represent a burden in some cases, the main finding of the article is that the procedures and related costs vary between countries to such a degree that it is impossible to claim, as some earlier studies have done, that disproportionate regulation and bureaucracy constitute an insurmountable obstacle to the legalization of informal sector enterprises. 相似文献
13.
14.
15.
ABSTRACT. We reexamine the price structures and their welfare implications in three pricing regimes (mill, uniform and discriminatory) for a monopoly. We show that spatial price discrimination could provide the highest social welfare and, when consumers tastes are heterogeneous enough, also the highest consumer surplus. The superiority of spatial price discrimination is partially due to the larger output produced and partially due to differential treatment for consumers with heterogeneous tastes. 相似文献
16.
17.
18.
19.
R. Burleigh Juliet Clutton-Brock P. J. Felder G. de G. Sieveking 《Journal of archaeological science》1977,4(4):353-366
The complete skull and skeleton of a dog were recently excavated from the neolithic flint mines at Grime's Graves in Norfolk. As very few complete skeletons of dogs have been found from neolithic contexts in Britain a detailed metrical comparison was made between the Grime's Graves specimen and dog skeletons of comparable antiquity and completeness from Easton Down and Windmill Hill in Wiltshire.Implicit in the study of the dog from Grime's Graves was the need to date it precisely. As the skeleton could not be sacrificed for radiocarbon dating, closely associated antlers of Red deer (Cervus elaphus) were used for this purpose. The date of the Grime's Graves dog is compared with the dates for other dog remains from recently excavated neolithic sites in the British Isles. 相似文献
20.