TY  - RPRT
TI  - Stratigraphy of the Pierre Shale, Valley City and Pembina Mountain areas, North Dakota
AU  - J. R. Gill
AU  - W. A. Cobban
PY  - 1965
DO  - 10.3133/pp392a
UR  - https://pubs.usgs.gov/publication/pp392A
ID  - pp392A
ER  -