全文获取类型
收费全文 | 563篇 |
免费 | 19篇 |
专业分类
582篇 |
出版年
2021年 | 2篇 |
2020年 | 8篇 |
2019年 | 17篇 |
2018年 | 20篇 |
2017年 | 20篇 |
2016年 | 22篇 |
2015年 | 12篇 |
2014年 | 24篇 |
2013年 | 144篇 |
2012年 | 12篇 |
2011年 | 14篇 |
2010年 | 23篇 |
2009年 | 10篇 |
2008年 | 16篇 |
2007年 | 13篇 |
2006年 | 14篇 |
2005年 | 12篇 |
2004年 | 14篇 |
2003年 | 6篇 |
2002年 | 4篇 |
2001年 | 7篇 |
2000年 | 7篇 |
1999年 | 7篇 |
1998年 | 8篇 |
1997年 | 9篇 |
1996年 | 3篇 |
1995年 | 4篇 |
1994年 | 5篇 |
1993年 | 6篇 |
1992年 | 7篇 |
1991年 | 8篇 |
1989年 | 6篇 |
1988年 | 7篇 |
1987年 | 3篇 |
1986年 | 8篇 |
1985年 | 11篇 |
1984年 | 10篇 |
1983年 | 6篇 |
1982年 | 5篇 |
1981年 | 2篇 |
1980年 | 7篇 |
1979年 | 4篇 |
1978年 | 5篇 |
1977年 | 9篇 |
1976年 | 2篇 |
1975年 | 3篇 |
1974年 | 2篇 |
1972年 | 3篇 |
1971年 | 2篇 |
1970年 | 3篇 |
排序方式: 共有582条查询结果,搜索用时 0 毫秒
31.
Adriana García Brian G. Jones Bryan E. Chenhalland Colin V. Murray-Wallace 《Alcheringa: An Australasian Journal of Paleontology》2013,37(4):507-518
The palaeobiota from a middle to late Holocene succession in Tom Thumbs Lagoon, N.S.W., Australia, reflects a range of environmental conditions caused by sea-level changes and active estuarine sedimentation. At the base of the succession (~ ?0.4 m AHD) a thin bed, containing molluscs dated at 6.7 ka B.P. by radiocarbon and amino acid racemisation, and foraminifers is indicative of open estuarine conditions. From +0.35 m AHD towards the top of the sequence the charophyte Lamprothamnium succinctum occurs in subrecent deposits. This species is characterised here by statistical measurements, and new characters are described and illustrated. The charophytes record a drop in sea level and the establishment of a lower salinity artificial wetland. The investigation has also established that decalcification in charophytes can be related to acidification produced by the release of organic acids, aggravated after 1928 by anthropogenic pollution. 相似文献
32.
33.
34.
35.
EXPERIENCE THE DIFFERENCE: THE COMPETITIVE STRATEGIES OF FOOD‐RELATED ENTREPRENEURS IN RURAL DENMARK 下载免费PDF全文
As food production becomes increasingly integrated, globalized and competitive, small‐scale food‐related enterprises in many European countries are struggling to market and monetize their products. Although these struggles have been well documented, few studies have considered the ways in which food‐related entrepreneurs in rural contexts are adapting to and overcoming these challenges. In particular, little is known about how they differentiate and add value to their products. This article focuses on the development and implementation of new and hybrid commercial strategies by food‐related entrepreneurs in three rural communities in Denmark. These strategies add experiential elements to the longstanding practice of commodifying myths associated with rural settings and identities. Although harnessing culture and experiences to sell things is nothing new, we demonstrate that some Danish entrepreneurs are responding to market competition by tweaking and extending these concepts. In particular, it is argued that entrepreneurs use different experiences with varying levels of intensity and consumer engagement for different purposes. Whereas passive experiences such as storytelling are used to educate consumers about the specific qualities of products, more active and participatory experiences are sold as add‐ons and standalone products. The findings contribute to our understanding of food‐related entrepreneurship in rural contexts, consumption, value creation and the experience of economy more broadly. 相似文献
36.
37.
Substantial European Structural and Investment Funds (ESIF) monies have been directed at regional economic and social development in Portugal in which Portuguese local government plays a vital role. Given the magnitude of funding, an important question turns on the effect of the ESIF on overall local authority performance. This paper focuses on the impact of the ESIF on Portuguese municipality performance and development. In particular, it investigates whether the ESIF improved the performance of Portuguese local government and which factors best explain its effect on municipality development. The analysis considers all 308 Portuguese local authorities for the period 2000–2014. Various policy implications flowing from the empirical results of this analysis are explored. 相似文献
38.
39.
40.
Robert Van de Noort Brian Cumby Lucy Blue Anthony Harding Linda Hurcombe Tom Monrad Hansen Andy Wetherelt Jenny Wittamore Andy Wyke 《International Journal of Nautical Archaeology》2014,43(2):292-313
This paper reports on the construction of a full‐scale Bronze Age‐type sewn‐plank boat based on the Ferriby boats. The boat, which was named Morgawr, was constructed in the National Maritime Museum Cornwall in Falmouth, England, during 2012 and the first months of 2013, as part of a larger exhibition in the museum. This paper provides the background and context of the project, describes the process of building the craft, and reflects in particular on differences between Morgawr and the ‘hypothetical reconstruction of a complete sewn‐plank boat’ published in 1990 by Ted Wright and John Coates which formed the basis for this project. 相似文献