TY  - RPRT
TI  - Preliminary report on the coal resources of the National Petroleum Reserve in Alaska
AU  - G. C. Martin
AU  - James E. Callahan
PY  - 1978
DO  - 10.3133/ofr781033
UR  - https://pubs.usgs.gov/publication/ofr781033
ID  - ofr781033
ER  -