Two new species of Broiliellus (Amphibians) from the Permian of Texas / Robert E. De Mar --

v.16:no.5(1967)

Longiscitula houghae; a new genus of dissorophid amphibian from the Permian of Texas / Robert E. DeMar, Asst. Professor of Geology, University of Illinois, Chicago Circle Campus.

v.16:no.2(1966)

New and little known genera and species of vertebrates from the Lower Permian of Oklahoma / [by] Everett C. Olson -- [Patricia M. Williams, editor]

v.18:no.3(1970)

Relationships of Diadectes / Everett Claire Olson --

v.14:no.10(1966)

Permo-Carboniferous fresh water burrows / Everett C. Olson -- and Kathryn Bolles --.

v.33:no.15(1975)