Foraminifera and stratigraphy of the upper part of the Pierre Shale and lower part of the Fox Hills Sandstone (Cretaceous) north-central South Dakota - Mello, James F., 1936- (Washington, D.C. : United States Geological Survey, 1969)
Bibliography: p. 112-116
Keywords: Foraminifera, Fossil; Paleontology -- Cretaceous; Paleontology -- South Dakota