01398nam 2200409Ia 450 991069874270332120090417120644.0(CKB)5470000002396429(OCoLC)318646893(OCoLC)965753569(OCoLC)995470000002396429(EXLCZ)99547000000239642920090417d1969 ua 0engurmn||||a||||txtrdacontentcrdamediacrrdacarrierReports and maps of the Geological Survey released only in the open files, 1968[electronic resource] /by Betsy A. Weld, Margaret S. Griffin, and George W. BrettWashington :U.S. Dept. of the Interior, Geological Survey,1969.24 pages DJVU, image fileGeological Survey circular ;568Title from title screen (viewed Apr. 17, 2009).Includes index.MapsfastBibliographies.lcgftMaps.Weld Betsy A1388375Griffin Margaret S1388376Brett George W1388377Geological Survey (U.S.)GPOGPOBOOK9910698742703321Reports and maps of the Geological Survey released only in the open files, 19683481741UNINA