TY  - RPRT
TI  - Preliminary map of phosphorous provinces in the conterminous United States
AU  - James Bachelder Cathcart
AU  - Edwin Wilson Tooker
PY  - 1979
DO  - 10.3133/ofr79576a
UR  - https://pubs.usgs.gov/publication/ofr79576A
ID  - ofr79576A
ER  -