TY  - RPRT
TI  - Preliminary grade and volume model of alluvial Sn-Au placers
AU  - J. D. Bliss
AU  - W. D. Menzie
PY  - 1995
DO  - 10.3133/ofr95649
UR  - https://pubs.usgs.gov/publication/ofr95649
ID  - ofr95649
ER  -