TY  - RPRT
TI  - Map showing distribution pattern of tungsten from samples of the nonmagnetic fraction of heavy-mineral concentrates, northern Sonora, Mexico
AU  - Glenn H. Allcott
AU  - George VanTrump
AU  - Jose Lee-Moreno
AU  - Arthur Gomez
PY  - 1977
DO  - 10.3133/ofr77334
UR  - https://pubs.usgs.gov/publication/ofr77334
ID  - ofr77334
ER  -