TY  - RPRT
TI  - Map showing distribution pattern of strontium from samples of the nonmagnetic fraction of heavy-mineral concentrates, northern Sonora, Mexico
AU  - Margaret Hinkle
AU  - S.K. McDanal
AU  - George Benitez
AU  - Luis Chavez
PY  - 1977
DO  - 10.3133/ofr77339
UR  - https://pubs.usgs.gov/publication/ofr77339
ID  - ofr77339
ER  -