TY - BOOK ID - 138188708 TI - Reports and maps of the Geological Survey released only in the open files, 1971 AU - Weld, Betsy A. AU - Iseri, Kathleen T. AU - Brett, George W. AU - Geological Survey (U.S.) PY - 1972 PB - Washington : U.S. Dept. of the Interior, Geological Survey, DB - UniCat KW - Geological Survey (U.S.) KW - Maps UR - https://www.unicat.be/uniCat?func=search&query=sysid:138188708 AB - ER -