01290oam 2200373Ia 450 991069874350332120090417111813.0(CKB)5470000002396421(OCoLC)318642310(EXLCZ)99547000000239642120090417d1972 ua 0engurmn||||a||||txtrdacontentcrdamediacrrdacarrierReports and maps of the Geological Survey released only in the open files, 1971[electronic resource] /by Betsy A. Weld, Kathleen T. Iseri, and George W. BrettWashington :U.S. Dept. of the Interior, Geological Survey,1972.26 pages DJVU, image fileGeological Survey circular ;648Title from title screen (viewed Apr. 17, 2009).Includes index.Bibliographies.lcgftWeld Betsy A1388375Iseri Kathleen T1388378Brett George W1388377Geological Survey (U.S.)GPOGPOGPOBOOK9910698743503321Reports and maps of the Geological Survey released only in the open files, 19713438906UNINA