01281nam 2200361Ia 450 991069874070332120090420092659.0(CKB)5470000002396450(OCoLC)318792321(EXLCZ)99547000000239645020090420d1962 ua 0engurmn||||a||||txtrdacontentcrdamediacrrdacarrierReports and maps of the Geological Survey released only in the open files, 1961[electronic resource] /by Betsy A. Weld, Erwin S. Asselstine, and Arthur JohnsonWashington, D.C. :U.S. Dept. of the Interior, Geological Survey,[1962?]14 pages DJVU, image fileGeological Survey circular ;463Title from title screen (viewed Apr. 20, 2009).Includes index.Bibliographies.lcgftWeld Betsy A1388375Asselstine Erwin S1404858Johnson Arthur1389164Geological Survey (U.S.)GPOGPOBOOK9910698740703321Reports and maps of the Geological Survey released only in the open files, 19613480255UNINA