TY  - RPRT
TI  - Guide for the calculation of coal resources using the computer program GARNET
AU  - Sharon S. Crowley
AU  - Antoinette L. Medlin
AU  - R. J. Smith
PY  - 1981
DO  - 10.3133/ofr81563
UR  - https://pubs.usgs.gov/publication/ofr81563
ID  - ofr81563
ER  -