TY  - RPRT
TI  - Summary of the geology, mineral resources, landscape geochemistry, and engineering geologic characteristics of the northern Powder River coal region, Montana: Engineering geologic characteristics
PY  - 1977
DO  - 10.3133/ofr77292c
UR  - https://pubs.usgs.gov/publication/ofr77292C
ID  - ofr77292C
ER  -