全文获取类型
收费全文 | 579篇 |
免费 | 15篇 |
出版年
2020年 | 10篇 |
2019年 | 9篇 |
2018年 | 9篇 |
2017年 | 14篇 |
2016年 | 16篇 |
2015年 | 7篇 |
2014年 | 8篇 |
2013年 | 243篇 |
2012年 | 15篇 |
2011年 | 12篇 |
2010年 | 11篇 |
2009年 | 10篇 |
2008年 | 11篇 |
2007年 | 3篇 |
2006年 | 6篇 |
2005年 | 3篇 |
2004年 | 9篇 |
2003年 | 7篇 |
2002年 | 7篇 |
2001年 | 6篇 |
2000年 | 7篇 |
1999年 | 8篇 |
1998年 | 6篇 |
1997年 | 4篇 |
1995年 | 11篇 |
1994年 | 6篇 |
1993年 | 8篇 |
1992年 | 4篇 |
1987年 | 3篇 |
1986年 | 3篇 |
1985年 | 3篇 |
1984年 | 3篇 |
1983年 | 6篇 |
1982年 | 8篇 |
1981年 | 10篇 |
1980年 | 5篇 |
1979年 | 7篇 |
1978年 | 6篇 |
1977年 | 7篇 |
1976年 | 5篇 |
1975年 | 5篇 |
1973年 | 5篇 |
1972年 | 6篇 |
1970年 | 2篇 |
1969年 | 2篇 |
1968年 | 2篇 |
1967年 | 5篇 |
1966年 | 6篇 |
1951年 | 2篇 |
1948年 | 3篇 |
排序方式: 共有594条查询结果,搜索用时 15 毫秒
61.
George Curry Gina Koczberski 《Oceania; a journal devoted to the study of the native peoples of Australia, New Guinea, and the Islands of the Pacific》1999,70(2):130-145
This paper reports on ongoing research on migration and circulation between the Wosera sub-district, East Sepik Province, Papua New Guinea, and the island province of West New Britain. We examine the pressures contributing to increased family migration and longer-term, possibly permanent, migration from the Wosera. While rising resource/population pressure and stricter forms of land tenure arrangements are altering patterns of out-migration, the situation for long-term and temporary migrants in West New Britain is becoming less certain as land shortages begin to limit opportunities for further settlement and indigenous landowners become less tolerant of migrants from other provinces. We discuss these influences on migration patterns within the context of emerging social stratification of Wosera society, and consider the implications for both migrants and non-migrants. 相似文献
62.
63.
George Papatheodorou Maria Geraga George Ferentinos 《International Journal of Nautical Archaeology》2005,34(1):95-109
An integrated remote-sensing survey was carried out in Navarino Bay, where in 1827 a battle was fought between the allied British, French and Russian navies and the Turkish-Egyptian fleet. Integration and interpretation of the remote-sensing data has shown the presence of shipwreck remains on the sea-floor and possible shipwrecks buried under the sea-bed. It has also shown that the historical remains are under threat from the heavy anchors of tankers which sink into the sea-bed and, when dragged, dig furrows, thus disintegrating the shipwreck remains. To protect the sites the construction of permanent anchoring systems away from the shipwreck remains is recommended.
© 2005 The Nautical Archaeology Society 相似文献
© 2005 The Nautical Archaeology Society 相似文献
64.
65.
George Iliopoulos Nena Galanidou Spiros A. Pergantis Vicky Vamvakaki Nikos Chaniotakis 《Journal of archaeological science》2010
We report analytical work undertaken in order to identify the geochemical taphonomy of the osteological collection (human and animal bones) recovered from a 1950s excavation at Katsambas, a small cavity in the marly limestone on the west bank of Kairatos River, Crete. The site had funerary use and yielded material of Neolithic and Minoan age with poor stratigraphical association. Disintegration of provenance labels from bags has introduced further uncertainty about the contexts of recovery. Samples of human and animal bones that macroscopically appear to belong to three taphonomic categories were studied by means of FT-IR spectroscopy, TEM microscopy and REE analysis to explore the taphonomical processes the bones have undergone. Although not novel in palaeontological research the use of REE opens a new path to investigating poorly provenanced osteological collections from old excavations. Such geochemical work offers a proxy to their relative dating through the evaluation of the time span bones have remained in the sediments and their respective taphonomic histories. 相似文献
66.
Brian S. Robinson George L. Jacobson Martin G. Yates Arthur E. Spiess Ellen R. Cowie 《Journal of archaeological science》2009,36(10):2184-2191
A paucity of archaeological remains of Atlantic salmon in Northeast North America has been cited as evidence that the species may have been present in the region only during and after the Little Ice Age (ca. 1450–1850 AD), one of coldest periods of the Holocene. However, significant problems of preservation, recovery and identification remain. Here, improved methods of identification use vertebra structure to distinguish salmon from trout, and strontium/calcium ratios to differentiate sea-run from landlocked salmon. In addition to the Little Ice Age, Atlantic salmon is identified in tightly dated contexts at 7000–6500 and 3500–3000 calendar years BP, during climate periods that were comparatively warm and wet. 相似文献
67.
68.
69.
70.