全文获取类型
收费全文 | 472篇 |
免费 | 30篇 |
出版年
2020年 | 13篇 |
2019年 | 15篇 |
2018年 | 21篇 |
2017年 | 29篇 |
2016年 | 22篇 |
2015年 | 20篇 |
2014年 | 12篇 |
2013年 | 142篇 |
2012年 | 13篇 |
2011年 | 11篇 |
2010年 | 25篇 |
2009年 | 11篇 |
2008年 | 11篇 |
2007年 | 10篇 |
2006年 | 6篇 |
2005年 | 14篇 |
2004年 | 6篇 |
2003年 | 5篇 |
2002年 | 7篇 |
2001年 | 4篇 |
2000年 | 6篇 |
1999年 | 6篇 |
1998年 | 4篇 |
1997年 | 6篇 |
1996年 | 2篇 |
1995年 | 4篇 |
1994年 | 5篇 |
1993年 | 5篇 |
1992年 | 3篇 |
1991年 | 6篇 |
1990年 | 2篇 |
1989年 | 6篇 |
1987年 | 7篇 |
1986年 | 2篇 |
1985年 | 6篇 |
1984年 | 3篇 |
1982年 | 2篇 |
1981年 | 2篇 |
1980年 | 3篇 |
1979年 | 1篇 |
1978年 | 2篇 |
1977年 | 4篇 |
1976年 | 1篇 |
1975年 | 1篇 |
1974年 | 3篇 |
1973年 | 2篇 |
1972年 | 2篇 |
1971年 | 1篇 |
1970年 | 1篇 |
1969年 | 2篇 |
排序方式: 共有502条查询结果,搜索用时 203 毫秒
11.
12.
13.
14.
15.
16.
17.
Catherine Akeroyd 《Imago Mundi: The International Journal for the History of Cartography》2016,68(2):257-258
Advanced doctoral students whose dissertations are substantially concerned with the history of cartography are invited to contact the editor of this section (Dr Elizabeth Baigent, Wycliffe Hall, Oxford OX2 6PW, UK; elizabeth.baigent@wycliffe.ox.ac.uk) to discuss the submission of a short article. For a list of doctoral theses in progress see http://www.maphistory.info/futurephd.html. 相似文献
18.
Catherine Bateson 《Irish Studies Review》2016,24(2):238-240
19.
Véronique Favre-Bonte Elodie Gardet Catherine Thevenard-Puthod 《European Planning Studies》2019,27(5):1035-1057
As there is little research on the link between territories and interorganisational networks, this paper examines how the nature of a territory influences the characteristics of innovation networks. It compares the innovation network forms of two types of territories (high-altitude and medium-altitude mountain resorts) regarding four characteristics of networks widely debated in the literature: the nature of the relationships between members, the mode of regulation used, the architecture, and the geographical proximity of members. This research makes a significant contribution to both the spatial development and innovation management literature: indeed, our results show that according to the nature of the territory, innovation networks differ in terms of partners, geographical proximity, and regulation mode. However, the nature of the territory does not seem to influence the architecture of the innovation network since those networks need a hub organization that orchestrates the partners’ actions. These results, by providing a better understanding of the characteristics of innovation networks, help tourist territories to better attract customers. 相似文献
20.
This study examines preservation of microfossils identified as introduced Ipomoea batatas in soils from northern New Zealand. Starch grains and xylem cells showed highly variable preservation, from good to extremely poor. For starch grains, the latter included brown-staining, expansion and distortion of the grain and vacuole, loss of the Maltese cross, pitting, cracking, fragmentation and disintegration. Degraded xylem showed similar brown-staining, occasional cracking, cross-wise fragmentation, with wall pits becoming progressively less visible or showing distortion, expansion and coalescence. 相似文献