TY  - RPRT
TI  - Map showing distribution pattern of silver from samples of the nonmagnetic fraction of heavy-mineral concentrates, northern Sonora, Mexico
AU  - Elwin L. Mosier
AU  - Antonio Ortiz
AU  - Juan Morin
AU  - Hector Ontiveras
PY  - 1977
DO  - 10.3133/ofr77336
UR  - https://pubs.usgs.gov/publication/ofr77336
ID  - ofr77336
ER  -