TY  - RPRT
TI  - Laboratory study of high-grade uranium-bearing lignite from Harding County, South Dakota
AU  - James M. Schopf
AU  - Ralph J. Gray
PY  - 1956
DO  - 10.3133/tei480
UR  - https://pubs.usgs.gov/publication/tei480
ID  - tei480
ER  -