01323nam 2200361Ia 450 991069873840332120240202000608.0(CKB)5470000002396473(OCoLC)318813489(EXLCZ)99547000000239647320090420d1957 ua 0engurmn||||a||||txtrdacontentcrdamediacrrdacarrierReports and maps of the Geological Survey released only in the open files, 1956[electronic resource] /by Betsy A. Weld, William S. Eisenlohr, Jr., and Arthur JohnsonWashington, D.C. :U.S. Dept. of the Interior, Geological Survey,1957.12 pages DJVU, image fileGeological Survey circular ;401Title from title screen (viewed Apr. 20, 2009).Includes index.Bibliographies.lcgftWeld Betsy A1388375Eisenlohr William S(William Stewart)Jr.,1907-1997.1587170Johnson Arthur1389164Geological Survey (U.S.)GPOGPOBOOK9910698738403321Reports and maps of the Geological Survey released only in the open files, 19563877397UNINA