TY  - RPRT
TI  - Comparison of the Wilfley concentration table and hand panning for concentration of heavy minerals prior to geochemical analysis
AU  - William R. Greenwood
AU  - M.E. Koesterer
AU  - Steve Ludington
AU  - Donald A. Risoli
PY  - 1978
DO  - 10.3133/ofr78712
UR  - https://pubs.usgs.gov/publication/ofr78712
ID  - ofr78712
ER  -