TY  - RPRT
TI  - Composition and properties of the Pierre Shale and equivalent rocks, northern Great Plains region
AU  - Leonard Gene Schultz
AU  - H. A. Tourtelot
AU  - J. R. Gill
AU  - J.G. Boerngen
PY  - 1980
DO  - 10.3133/pp1064b
UR  - https://pubs.usgs.gov/publication/pp1064B
ID  - pp1064B
ER  -