全文获取类型
收费全文 | 331篇 |
免费 | 15篇 |
专业分类
346篇 |
出版年
2021年 | 3篇 |
2020年 | 3篇 |
2019年 | 6篇 |
2018年 | 12篇 |
2017年 | 13篇 |
2016年 | 8篇 |
2015年 | 7篇 |
2014年 | 6篇 |
2013年 | 80篇 |
2012年 | 8篇 |
2011年 | 5篇 |
2010年 | 9篇 |
2009年 | 7篇 |
2008年 | 6篇 |
2007年 | 2篇 |
2006年 | 8篇 |
2005年 | 7篇 |
2004年 | 11篇 |
2003年 | 9篇 |
2002年 | 7篇 |
2001年 | 5篇 |
2000年 | 7篇 |
1999年 | 5篇 |
1998年 | 5篇 |
1997年 | 9篇 |
1996年 | 2篇 |
1995年 | 3篇 |
1994年 | 2篇 |
1993年 | 3篇 |
1992年 | 8篇 |
1991年 | 5篇 |
1990年 | 3篇 |
1989年 | 2篇 |
1988年 | 2篇 |
1987年 | 2篇 |
1984年 | 4篇 |
1983年 | 3篇 |
1982年 | 2篇 |
1981年 | 6篇 |
1980年 | 3篇 |
1979年 | 6篇 |
1978年 | 6篇 |
1977年 | 9篇 |
1976年 | 2篇 |
1975年 | 5篇 |
1974年 | 3篇 |
1973年 | 4篇 |
1972年 | 4篇 |
1971年 | 2篇 |
1970年 | 2篇 |
排序方式: 共有346条查询结果,搜索用时 15 毫秒
91.
92.
93.
94.
Homeowners who make their homes their primary residence have resisted the entry of rentals into their neighborhoods and cities. Possible reasons underlying this resistance are that rentals reduce the property values, increase the property tax burdens, and raise the price of public services for these homeowners. We relate the market values of single-family homes occupied by permanent homeowners, the effective property tax rate of these homeowners, and the tax price they pay for public services to shifts in their city's housing units toward a variety of different types of rentals and second homes. Our analysis is based on large panels of Florida homes containing hundreds of thousands and millions of observations. Our results show that increases in the share of a city's housing units used as rentals or second homes reduce the home values, increase the property tax burdens, and raise the public services prices of homeowners who permanently reside in single-family homes. Impacts vary in magnitude among single-family, condominium, and mobile homes used as rentals and second homes. Estimated impacts are the strongest for share increases in single-family rentals and second homes. 相似文献
95.
Johs G. Andersen Keith Manchester Charlotte Roberts 《International Journal of Osteoarchaeology》1994,4(1):21-30
Infective lesions of bone in leprosy are of two types. In the rhinomaxillary syndrome, superficial infective changes in the bones of the maxilla are due to the presence of Mycobacterium leprae. Lytic foci in the medulla or the outer cortical surface may be due to Mycobacterium leprae at the site as granulomatous lesions. The most frequent infective bone changes in leprosy are, however, sequelae of regional anaesthesia and soft tissue ulceration. The bone lesions are due to pyogenic bacteria and the nature of these infective lesions is similar to that in non-leprous conditions. The pyogenic lesions in leprosy are restricted to the bones of the hands, feet and lower legs. 相似文献
96.
Gwen Dalby Keith Manchester Charlotte A. Roberts 《International Journal of Osteoarchaeology》1993,3(3):207-212
A total of 1164 temporal bones from various cemetery sites in England were examined using a fibre optic endoscope. Eight bones were found to have evidence of otosclerosis in which proliferative new bone fixes the footplate of the stapes into the oval window, causing deafness. A prevalence of 0.9 per cent in this study is comparable with the incidence found in modern white populations and with that found in a study of 2760 Lithuanian temporal bones of various periods. 相似文献
97.
A method is proposed for recording linear enamel hypoplasia (LEH) present on archaeological pig teeth. The methods described have been developed and tested on material from five archaeological sites of a wide range of periods; Durrington Walls (UK), Wellin, Ename, Sugny and Londerzeel (Belgium). Recommendations are made on what teeth, surface, cusp, and side to record, as well as on details of the visibility, the identification and the measurement of LEH lines. Problems encountered with the application of the recording protocol to the five case studies are detailed, and possible interpretative drawbacks are discussed. © 1998 John Wiley & Sons, Ltd. 相似文献
98.
99.
Rooflessness in London emerged as a media issue and political problem during the 1980s. While "rough sleeping" undoubtedly increased, numbers are hard to quantify because studies are unreliable, use different categories, and people seamlessly drift from one category to another. This article analyzes the causes of rooflessness in London, focusing on central government policy change at a time when London, atypically among major cities, had no overarching metropolitan government. The creation of multiple quasi-governmental agencies and charities whose responsibilities for homelessness overlap does not help coordination. Many short-term initiatives have been attempted, but solving rooflessness may require more radical changes if endemic homelessness is not to be the condition of the post-welfare state. 相似文献
100.
This research uses an alternative economic composition methodology that classifies 52 Idaho rural communities. This methodology classifies communities as dependent, diversified, or post-industrial. A survey was mailed to elected officials (mayors and city council) from the sample of 52 rural communities to examine whether there is a relationship between environmental policy support and economic type. One hundred and thirty-three respondents (48%) returned the surveys. The findings reveal that the economic composition of the community was related to views of environmental policy on 7 of 16 measures while controlling for gender, political ideology, and age. 相似文献