TY  - RPRT
TI  - Occurrence of platinum in a black sand from a beach deposit in San Mateo County, California
AU  - Gretchen Luepke
AU  - Norman M. Maher
PY  - 1991
DO  - 10.3133/ofr91308
UR  - https://pubs.usgs.gov/publication/ofr91308
ID  - ofr91308
ER  -