01337oam 2200409 a 450 991069189060332120030923090249.0(CKB)5470000002348494(OCoLC)51004053ocm51004053(OCoLC)995470000002348494(EXLCZ)99547000000234849420021114d2002 ua 0engurnn||||||txtrdacontentcrdamediacrrdacarrierManaging and protecting aggregate resources[electronic resource] /by William H. LangerVersion 1.0.Denver, Colo. :U.S. Dept. of the Interior, U.S. Geological Survey,2002.Open-file report ;02-415Title from PDF title screen (viewed on Sept. 23, 2003).Includes bibliographical references.Aggregate industryUnited StatesAggregates (Building materials)United StatesAggregate industryAggregates (Building materials)Langer William H191378Geological Survey (U.S.)GISGISGPOBOOK9910691890603321Managing and protecting aggregate resources3426578UNINA