TY  - RPRT
TI  - Preliminary map of platinum and platinum-group metal provinces in the conterminous United States
AU  - Norman J. Page
AU  - Edwin Wilson Tooker
PY  - 1979
DO  - 10.3133/ofr79576b
UR  - https://pubs.usgs.gov/publication/ofr79576B
ID  - ofr79576B
ER  -