TY  - RPRT
TI  - Foraminifera and stratigraphy of the upper part of the Pierre Shale and lower part of the Fox Hills Sandstone (Cretaceous), north-central South Dakota
AU  - James F. Mello
PY  - 1969
DO  - 10.3133/pp611
UR  - https://pubs.usgs.gov/publication/pp611
ID  - pp611
ER  -