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Date: 2010-04-12 11:32:32Construction Geology Architecture Geological surveys Building materials Delaware Geological Survey Crushed stone Minerals Yearbook United States Bureau of Mines Pavements Stone Natural materials | 2007 Minerals Yearbook DELAWARE [ADVANCE RELEASE] U.S. Department of the Interior U.S. Geological SurveyAdd to Reading ListSource URL: minerals.er.usgs.govDownload Document from Source WebsiteFile Size: 53,06 KBShare Document on Facebook |