TY  - RPRT
TI  - An assessment of the economic potential of lignite and leonardite resources in the Williston Basin, North Dakota
AU  - Brian N. Shaffer
PY  - 2021
DO  - 10.3133/ofr20201135
UR  - https://pubs.usgs.gov/publication/ofr20201135
ID  - ofr20201135
ER  -