TY - BOOK ED - United States. TI - To promote development and conservation of phosphate resources: hearing before Subcommittee on Minerals, Materials and Fuels, 85th Congress, 1st session, on S. 334, Mar. 20, 1957 PY - 1957/// CY - [Washington, D.C.] KW - Phosphate leases KW - United States N1 - Distribution made by issuing office; CRDP Program Historic Shelflist record ER -