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1 U.S. Geological Survey Open-File Report 03-001 开放资源 馆员登记
  Most of the sediment data in this report are broken into data layers by their original source project and are provided as single-point vector datasets with sample identifiers, navi...
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2 U.S. National Report to International Union of Geodesy and Geophysics 1991-1994 开放资源 机器抓取
  This quadrennial report contains geoscientific and cross-disciplinary articles devided into six major sections: Properties of the Solid Earth, Dynamics of the Solid Earth and Other...
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3 Ulrichsweb - Global Serials Directory 未开放资源 专家推荐
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4 UNESCO 开放资源 馆员登记
  UNESCO works to create the conditions for dialogue among civilizations, cultures and peoples, based upon respect for commonly shared values. It is through this dialogue that the wo...
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5 University of Toronto Libraries -- The Barren Lands Digital Collection 开放资源 机器抓取
  This site documents two exploratory surveys of the Barren Lands region west of Hudson Bay, in northern Manitoba and Saskatchewan and the area now known as Nunavut. Drawing on mater...
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6 Urban Ecosystems 未开放资源 机器抓取
  Urban Ecosystems is an international journal devoted to scientific investigation of the ecology of urban environments, and policy implications. The scope is broad, including intera...
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7 Urban Geography 未开放资源 机器抓取
  Urban Geography, semi-quarterly, publishes original papers on problem-oriented current research by geographers and other social scientists on urban policy. race, poverty, and ethni...
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8 USGS--Science for a changing world 开放资源 馆员登记
  The USGS is a science organization that provides impartial information on the health of our ecosystems and environment, the natural hazards that threaten us, the natural resources ...
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