TY  - RPRT
TI  - Laboratory study of uranium-bearing lignite from western North Dakota and South Dakota
AU  - James M. Schopf
AU  - Ralph J. Gray
AU  - Charles J. Felix
PY  - 1955
DO  - 10.3133/tei572
UR  - https://pubs.usgs.gov/publication/tei572
ID  - tei572
ER  -