01279nam 2200361Ia 450 991069873940332120090420130611.0(CKB)5470000002396463(OCoLC)318811671(EXLCZ)99547000000239646320090420d1960 ua 0engurmn||||a||||txtrdacontentcrdamediacrrdacarrierReports and maps of the Geological Survey released only in the open files, 1959[electronic resource] /by Betsy A. Weld, Erwin S. Asselstine, and Arthur JohnsonWashington, D.C. :U.S. Dept. of the Interior, Geological Survey,1960.10 pages DJVU, image fileGeological Survey circular ;428Title from title screen (viewed Apr. 20, 2009).Includes index.Bibliographies.lcgftWeld Betsy A1388375Asselstine Erwin S1404858Johnson Arthur1389164Geological Survey (U.S.)GPOGPOBOOK9910698739403321Reports and maps of the Geological Survey released only in the open files, 19593524616UNINA