Fox, S. K. (1954). Cretaceous Foraminifera from the Greenhorn, Carlile and Cody Formations South Dakota, Wyoming: Significant Foraminifera from a section north of the Black Hills and a section in the eastern Bighorn Basin. U. S. Gov. Print. Off.
Chicago-Zitierstil (17. Ausg.)Fox, Stephen Knowiton. Cretaceous Foraminifera from the Greenhorn, Carlile and Cody Formations South Dakota, Wyoming: Significant Foraminifera from a Section North of the Black Hills and a Section in the Eastern Bighorn Basin. Washington, DC: U. S. Gov. Print. Off, 1954.
MLA-Zitierstil (9. Ausg.)Fox, Stephen Knowiton. Cretaceous Foraminifera from the Greenhorn, Carlile and Cody Formations South Dakota, Wyoming: Significant Foraminifera from a Section North of the Black Hills and a Section in the Eastern Bighorn Basin. U. S. Gov. Print. Off, 1954.