The nature of shield abnormalities in the turtle shell / [by] Rainer Zangerl -- and Ralph G. Johnson --.

v.10:no.29(1957)

Tooth histology and ultrastructure of a Paleozoic shark, Edestus heinrichii / Katherine Taylor -- and Thomas Adamec --.

v.33:no.24(1977)

A mastodont tooth from Szechwan, China / Dirk A. Hooijer -- and Edwin H. Colbert --.

v.10:no.12(1951)