01294oam 2200373Ia 450 991069874300332120090417111452.0(CKB)5470000002396426(OCoLC)318634391(EXLCZ)99547000000239642620090417d1971 ua 0engurmn||||a||||txtrdacontentcrdamediacrrdacarrierReports and maps of the Geological Survey released only in the open files, 1970[electronic resource] /by Betsy A. Weld, Margaret S. Griffin, and George W. BrettWashington :U.S. Dept. of the Interior, Geological Survey,1971.23 pages DJVU, image fileGeological Survey circular ;638Title from title screen (viewed Apr. 17, 2009).Includes index.Bibliographies.lcgftWeld Betsy A1388375Griffin Margaret S1388376Brett George W1388377Geological Survey (U.S.)GPOGPOGPOBOOK9910698743003321Reports and maps of the Geological Survey released only in the open files, 19703524617UNINA