Foraminifera and stratigraphy of the upper part of the Pierre Shale and lower part of the Fox Hills Sandstone (Cretaceous) north-central South Dakota /
by James F. Mello
- Washington, D.C. : United States Geological Survey, 1969
- iv, 121 p. : ill. (1 fold. in pocket), maps. ; 29 cm.
- Geological Survey professional paper ; no.611 .