TY  - RPRT
TI  - Preliminary structure contour map of the Bear's Den-Flat Coulee-Whitelash districts North Central, Montana
AU  - C. E. Erdmann
PY  - 1930
DO  - 10.3133/ofr301
UR  - https://pubs.usgs.gov/publication/ofr301
ID  - ofr301
ER  -