TY  - RPRT
TI  - The Permian phosphorite deposits of western United States
AU  - V.E. McKelvey
AU  - Roger Warren Swanson
AU  - Richard Porter Sheldon
PY  - 1952
DO  - 10.3133/ofr53166
UR  - https://pubs.usgs.gov/publication/ofr53166
ID  - ofr53166
ER  -