TY  - RPRT
TI  - The purchase of coal under Government and commercial specifications on the basis of its heating value, with analyses of coal delivered under Government contracts
AU  - Dwight T. Randall
PY  - 1908
DO  - 10.3133/b339
UR  - https://pubs.usgs.gov/publication/b339
ID  - b339
ER  -