Cardipeltis; an early Devonian agnathan of the order Heterostraci / Robert H. Denison.

v.16:no.4(1966)

Early Devonian lungfishes from Wyoming, Utah, and Idaho / [by] Robert H. Denison --

v.17:no.4(1968)

Early devonian vertebrates from the Keoydart formation of Nova Scotia.

v.37:no.17(1955)