TY  - RPRT
TI  - A mechanical panning technique for separation of fine-grained gold and other heavy minerals
AU  - B.L. English
AU  - G. A. Desborough
AU  - W. H. Raymond
PY  - 1987
DO  - 10.3133/ofr87364
UR  - https://pubs.usgs.gov/publication/ofr87364
ID  - ofr87364
ER  -