TY  - RPRT
TI  - Preliminary report on analyses of Cretaceous coals from northwestern Alaska
AU  - James E. Callahan
AU  - E.G. Sloan
PY  - 1978
DO  - 10.3133/ofr78319
UR  - https://pubs.usgs.gov/publication/ofr78319
ID  - ofr78319
ER  -