Stratigraphy and paleontology of the uppermost Pennsylvanian and lowermost Permian rocks in Kansas,
by Melville R. Mudge and Ellis L. Yochelson. With sections on paleontology by Raymond C. Douglass [and others]
- Washington, U.S. Govt. Print. Off., 1962.
- 213 p. illus., plates, maps, diagrs., tables. 29 cm.