TY  - RPRT
TI  - Coal quality loss from acquisition to analysis; a preliminary time study
AU  - Robert G. Hobbs
AU  - James Daniel Cathcart
AU  - George A. Correia
PY  - 1983
DO  - 10.3133/ofr83167
UR  - https://pubs.usgs.gov/publication/ofr83167
ID  - ofr83167
ER  -