New Silurian Heterostraci from southeastern Yukon / Robert H. Denison. Intro. by H.R. Hovdebo, A.C. Lenz [and] E.W. Bamber.

v.14:no.7(1963)

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

v.16:no.4(1966)