TY - BOOK ID - 137233227 TI - Phosphate-rock resources of the United States AU - Cathcart, James Bachelder AU - Gulbrandsen, Robert A. AU - Sheldon, Richard Porter AU - Geological Survey (U.S.) PY - 1984 PB - [Reston, Va.?]. : United States Department of the Interior, Geological Survey, DB - UniCat KW - Phosphate rock KW - United States. UR - https://www.unicat.be/uniCat?func=search&query=sysid:137233227 AB - ER -