全文获取类型
收费全文 | 902篇 |
免费 | 42篇 |
专业分类
各国政治 | 61篇 |
工人农民 | 71篇 |
世界政治 | 99篇 |
外交国际关系 | 46篇 |
法律 | 401篇 |
中国政治 | 12篇 |
政治理论 | 242篇 |
综合类 | 12篇 |
出版年
2022年 | 4篇 |
2021年 | 12篇 |
2020年 | 15篇 |
2019年 | 33篇 |
2018年 | 38篇 |
2017年 | 52篇 |
2016年 | 43篇 |
2015年 | 29篇 |
2014年 | 30篇 |
2013年 | 121篇 |
2012年 | 20篇 |
2011年 | 37篇 |
2010年 | 39篇 |
2009年 | 29篇 |
2008年 | 44篇 |
2007年 | 25篇 |
2006年 | 26篇 |
2005年 | 23篇 |
2004年 | 21篇 |
2003年 | 14篇 |
2002年 | 17篇 |
2001年 | 15篇 |
2000年 | 15篇 |
1999年 | 10篇 |
1998年 | 12篇 |
1997年 | 9篇 |
1996年 | 16篇 |
1995年 | 6篇 |
1994年 | 6篇 |
1993年 | 10篇 |
1992年 | 13篇 |
1991年 | 13篇 |
1990年 | 10篇 |
1989年 | 7篇 |
1988年 | 8篇 |
1987年 | 13篇 |
1986年 | 10篇 |
1985年 | 12篇 |
1984年 | 11篇 |
1983年 | 4篇 |
1982年 | 10篇 |
1981年 | 6篇 |
1980年 | 6篇 |
1979年 | 11篇 |
1978年 | 8篇 |
1977年 | 5篇 |
1976年 | 5篇 |
1973年 | 4篇 |
1969年 | 3篇 |
1967年 | 4篇 |
排序方式: 共有944条查询结果,搜索用时 0 毫秒
81.
82.
83.
84.
Melissa D. Suarez M.S. Randal J. Southard Ph.D. Sanjai J. Parikh Ph.D. 《Journal of forensic sciences》2015,60(4):894-905
Soil samples have potential to be useful in forensic investigations, but their utility may be limited due to the inherent variability of soil properties, the wide array of analytical methods, and complexity of data analysis. This study examined the differentiation of similar soils based on both gross (texture, color, mineralogy) and explicit soil properties (elemental composition, cation exchange, Fe‐oxyhydroxides). Soils were collected from Fallbrook and adjacent map units from Riverside and San Diego Counties in California. Samples were characterized using multiple techniques, including chemical extracts, X‐ray diffraction (XRD), and Fourier transform infrared spectroscopy. Results were analyzed using multiple analytical approaches to compare counties and land uses. Some analyses (XRD, extractions) were better at distinguishing among samples than others (color, texture). Ratios of rare earth elements were particularly useful for distinguishing samples between counties. This potential to “fingerprint” soils illustrates the usefulness of a comprehensive soil database for criminal investigators. 相似文献
85.
86.
87.
88.
89.
Divide and Lose. By Michael Ionides. Published by Geoffrey Bles. 1960. Pp. 271. Sources and index. 21s. Nasser's New Egypt. By Keith Wheelock. Foreign Policy Research Institute No. 8. Praegar, New York. Pp. 326. $6. Personal Column. By Sir Charles Belgrave. Hutchinson and Co., Ltd. Pp. 248. Map, illustrated, indexed. 30s. Israel Resurgent. By Professor Norman Bentwich. Published by Ernest Benn, Ltd. 1960. Pp. 238. Map, index and bibliography. 27s. Women and the New East. By Ruth Frances Woodsmall. The Middle East Institute, Washington, D.C. 1960. Pp. 436. Map, index, illustrations. $5.50. Daughters of Allah. By Henny Harald Hansen. Translated from the Danish by Reginald Spink. George Allen and Unwin, London, 1960. 81½ × 6½ in. Pp. 190. Illustrations and sketch map. 21s. Crossroads. Land and Life in South‐west Asia. By George B. Cressey. Lip‐pingcott Co., Chicago, New York, Philadelphia. 1960. 7 × 10 in. Pp. 593. Illustrations, maps, tables and charts. Index. $12. The Chronicle of Petros di Sarkis Gilanentz. Concerning the Afghan invasion of Persia in 1722, the siege of Isfahan and the repercussions in Northern Persia, Russia and Turkey, translated from the original Armenian and annotated by C. O. Minasian, with an introduction and additional notes by L. Lockhart. Calouste Gulbenkian Foundation Armenian Library, Lisbon. 1959. Pp. xxiii, 77. No price indicated. The Sabres of Paradise. By Lesley Blanch. John Murray, London, 1960. Pp. 480. Illustrations, maps, bibliography, index. 30s. The Politics of the Developing Areas. Editors : Gabriel A. Almand and James S. Coleman. Published by Princeton University Press and Oxford University Press. Pp. 576. Indexed. 80s. The Memoirs of Lord Ismay. Heinemann. 1960. Pp. 464. Index, maps, diagrams. 4. net. Karachi Through a Hundred Years. By Herbert Feldman. Published by the Oxford University Press. Pp. 238. Illustrated and indexed. 27s. 6d. A Punjabi Village in Pakistan. By Zekiye Eglar. Columbia University Press and Oxford University Press, 1960. Pp. 240. Index, glossary, bibliography, illustrations. 48s. The Mind of Mr. Nehru. By R. K. Karanjia. George Allen and Unwin, Ltd. 1960. Pp. 112. 10s. 6d. net. Islands of the Marigold Sun. By Suresh Vaidya. Robert Hale, Ltd., London. Pp. 192. Map and illus. 18s. net. Pilgrimage for Plants. By Frank Kingdon‐Ward. Published by Harrap. Pp. 180. Bibliography, index and illus. 18s. Englishmen in Tibet from Bogle to Gould. By Sir Olaf Caroe. The Tibet Society of the United Kingdom. Pp. 12. Illus. 2s. 6d. Tibet in Revolt. By George N. Patterson. Faber and Faber. Pp. 197. 18 Illustrations; map. 21s. net. Britain and Chinese Central Asia. By Alastair Lamb. Routledge and Kegan Paul, London, 1960. Pp. 387. Sketch‐maps, index, bibliography. 42s. The Way and the Mountain. By Marco Pallis. Peter Owen, Ltd., London. Pp. 216. Illus. and appendices. 30s. Russia and China. By J. V. Davidson‐Houston. Robert Hale, Ltd., London, 1960. Pp. 200. Maps, index. Illus. 21s. Les Mouvements Nationaux chez les Musulmans de Russie: le “Sultangaliev‐isme” au Tatarstan. By Alexandre Bennigsen and Chantai Quelquejay. Mouton and Co. Paris, 1960. Neither War Nor Peace. By Hugh Seton‐Watson. Methuen and Co., London. 1960. Pp.504. 35s. Soviet Foreign Policy, 1917–1941. By George F. Kennan. Van Nostrand, New York. 1960. Pp. 191. $1.25. Özbekcha‐Ruscha Lughat/Uzbeksko‐Russkiy Slovar’. (Uzbek‐Russian Dictionary.) Compiled by the Academy of Sciences of the Uzbek S.S.R. Chief Editor, Professor A. K. Borovkov. State Dictionary Publishing House, Moscow. 1959. Pp. 839. 27 Rubles. An Introduction to the Turkmen Language. By G. K. Dulling. Published by Central Asian Research Centre. Pp. 48. Price 15s. The Economic Development of Communist China, 1949–1958. By T. J. Hughes and D. E. T. Luard. Issued under the auspices of the Royal Institute of International Affairs, O.U.P. 1959. Pp. 223. Maps and index. 22s. 6d. Han Fei‐Tzu. Works from the Chinese. By W. K. Liao. Probsthain's Oriental Series, Vols. XXV and XXVI. U.N.E.S.C.O. Collection of Representative Works —Chinese Series. Pp. 309 and 338. 30s. and 42s. respectively. Ballads and Stories from Tun‐Huang. By Arthur Waley. Published by George Allen and Unwin. Pp. 266. Index. 25s. 相似文献
90.