TY  - RPRT
TI  - Preliminary map of nickel provinces in the conterminous United States
AU  - Edwin Wilson Tooker
AU  - Henry Rowland Cornwall
PY  - 1979
DO  - 10.3133/ofr79576e
UR  - https://pubs.usgs.gov/publication/ofr79576E
ID  - ofr79576E
ER  -