TY  - RPRT
TI  - Chart showing number of particles of metal expected per 5 pound sample for various levels of grade and average particle size (regardless of the spatial distribution of particles)
AU  - A.T. Miesch
PY  - 1967
DO  - 10.3133/ofr67155
UR  - https://pubs.usgs.gov/publication/ofr67155
ID  - ofr67155
ER  -