TY  - RPRT
TI  - Preliminary report on the geology of the Harmon and Hansen lignite beds in the southern half of the Bowman-Gascoyne area, Slope, Bowman, and Adams counties, North Dakota
AU  - Robert C. Lewis
PY  - 1977
DO  - 10.3133/ofr77377
UR  - https://pubs.usgs.gov/publication/ofr77377
ID  - ofr77377
ER  -