全文获取类型
收费全文 | 1273篇 |
免费 | 63篇 |
出版年
2023年 | 7篇 |
2022年 | 7篇 |
2020年 | 21篇 |
2019年 | 36篇 |
2018年 | 49篇 |
2017年 | 62篇 |
2016年 | 51篇 |
2015年 | 31篇 |
2014年 | 34篇 |
2013年 | 453篇 |
2012年 | 44篇 |
2011年 | 35篇 |
2010年 | 42篇 |
2009年 | 37篇 |
2008年 | 25篇 |
2007年 | 33篇 |
2006年 | 16篇 |
2005年 | 17篇 |
2004年 | 15篇 |
2003年 | 19篇 |
2002年 | 17篇 |
2001年 | 18篇 |
2000年 | 13篇 |
1999年 | 23篇 |
1998年 | 9篇 |
1997年 | 13篇 |
1996年 | 11篇 |
1995年 | 13篇 |
1994年 | 9篇 |
1993年 | 8篇 |
1992年 | 10篇 |
1991年 | 6篇 |
1990年 | 6篇 |
1989年 | 7篇 |
1987年 | 7篇 |
1986年 | 6篇 |
1985年 | 8篇 |
1984年 | 9篇 |
1982年 | 5篇 |
1981年 | 11篇 |
1980年 | 9篇 |
1979年 | 14篇 |
1978年 | 5篇 |
1977年 | 6篇 |
1976年 | 7篇 |
1975年 | 6篇 |
1974年 | 8篇 |
1973年 | 11篇 |
1972年 | 4篇 |
1971年 | 4篇 |
排序方式: 共有1336条查询结果,搜索用时 15 毫秒
131.
132.
133.
134.
Recording and Analysis of Ship Graffiti in St Thomas’ Church and Blackfriars Barn Undercroft in Winchelsea,East Sussex,UK
下载免费PDF全文
![点击此处可从《International Journal of Nautical Archaeology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Thomas Dhoop Catriona Cooper Penny Copeland 《International Journal of Nautical Archaeology》2016,45(2):296-309
Two assemblages of ship graffiti were recorded using Reflectance Transformation Imaging in the ancient port town of Winchelsea. The engravings show characteristics common to most medieval ship graffiti in England, while displaying different levels of detail, which encouraged a nuanced interpretation. It is suggested that the ship graffiti demonstrate a multifaceted relationship with the sea. The St Thomas’ church graffiti could have been a means of spiritual protection and a devotional practice that cuts across different communities of practice and social groups. The seascape in Blackfriars Barn undercroft can be interpreted as an occasion of informal remembrance of the mustering of a large naval fleet before setting out. 相似文献
135.
136.
137.
138.
The Welfare Economics of Rural-To-Urban Migration: The Harris-Todaro Model Revisited 总被引:1,自引:0,他引:1
In this paper we extend the Harris-Todaro model of rural-to-urban migration to include urban agglomeration effects, some urban real wage flexibility, and a government budget constraint. Without employment subsidies laissez-faire migration is excessive unless real wage flexibility and agglomeration effects are high. Laissez-faire migration is too low compared with the first-best outcome supported by a subsidy, if its financing involves no costs. Simulations suggest that such a program would imply a substantial increase in taxation. If, as seems likely, an increase of this magnitude involves economic costs then the optimal outcome falls well short of first-best. 相似文献
139.
140.
Jennafer Kwait Katherine Marconi Deborah Helitzer Matthew W. Rodieck Thomas Randall David Celentano 《政策研究杂志》1999,27(4):855-871
The analysis presented in this paper explores the similarities and differences between the services selected as priorities for funding by the Baltimore Ryan White CARE Act Title I Planning Council during the first 2 years of the program in this metropolitan area, and services perceived by HIV/AIDS service providers and people living with HIV/AIDS to be unmet needs. The data used for these analyses were collected as part of a study to assess the implementation and impact of the CARE Act legislation in the Baltimore eligible metropolitan area( EMS ). This project includes three interrelated components: (a) a case study of the legislatively mandated Planning Council, (b) a survey of providers representing HIV/AIDS service organizations, and (c) a qualitative field study of the perceptions of people living with HIV/AIDS about the service delivery system. Taken together, the data from these three sources describe the similarities and differences among these three groups involved in HIV/AIDS care in Baltimore, in terms of their perceptions of services needed by people living with HIV / AIDS. The conclusions drawn from this study can be used to strengthen needs assessments in Title I-EMAs throughout the United States. 相似文献