1265762
9780788119422
Discuss issues related to the geologic distribution & characteristics of aggregate (building materials) & some implications of those factors for our Nation's economy. Provides input critical to the identification, protection, & extraction of suitable aggregate & reclamation efforts. Color photos & graphs.William H. Langer is the author of 'Natural Aggregate: Building America's Future, Public Issues in Earth Science : U. S. Geological Survey Circular 1110' with ISBN 9780788119422 and ISBN 0788119427.
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