TY  - RPRT
TI  - Disseminated flake graphite and amorphous graphite deposit types. An analysis using grade and tonnage models
AU  - David M. Sutphin
AU  - James D. Bliss
PY  - 1990
UR  - https://pubs.usgs.gov/publication/70016144
ID  - 70016144
ER  -