TY  - RPRT
TI  - Preliminary map of tungsten provinces in the conterminous United States
AU  - S. W. Hobbs
AU  - Edwin Wilson Tooker
PY  - 1979
DO  - 10.3133/ofr79576c
UR  - https://pubs.usgs.gov/publication/ofr79576C
ID  - ofr79576C
ER  -