TY  - RPRT
TI  - Preliminary report of 1977 coal drilling in eastern Montana and northeastern Wyoming: Geophysical logs for Big Horn, Fallon, and Powder River Counties, Montana
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
AU  - Montana Bureau of Mines and Geology
PY  - 1977
DO  - 10.3133/ofr77721a
UR  - https://pubs.usgs.gov/publication/ofr77721A
ID  - ofr77721A
ER  -