TY  - RPRT
TI  - The Square Buttes coal field, Oliver and Mercer Counties, North Dakota
AU  - William D. Johnson
AU  - Robert Paul Kunkel
PY  - 1959
DO  - 10.3133/b1076
UR  - https://pubs.usgs.gov/publication/b1076
ID  - b1076
ER  -