01292oam 2200373Ia 450 991069874400332120090416151211.0(CKB)5470000002396416(OCoLC)318611488(EXLCZ)99547000000239641620090416d1973 ua 0engurmn||||a||||txtrdacontentcrdamediacrrdacarrierReports and maps of the Geological Survey released only in the open files, 1972[electronic resource] /by Betsy A. Weld, Kathleen T. Iseri, and Marvin L. MillgateWashington :U.S. Dept. of the Interior, Geological Survey,1973.33 pages DJVU, image fileGeological Survey circular ;668Title from title screen (viewed Apr. 16, 2009).Includes index.Bibliographies.lcgftWeld Betsy A1388375Iseri Kathleen T1388378Millgate M. L1409395Geological Survey (U.S.)GPOGPOGPOBOOK9910698744003321Reports and maps of the Geological Survey released only in the open files, 19723495697UNINA