A study of the Eocene condylarthran mammal Hyopsodus (with 13 plates) /
Gazin, C. Lewis(Charles Lewis),1904-1996.
Washington : Smithsonian Institution Press,
1968.
En tête du titre:  Charles D. and Mary Vaux Walcott Research Fund
Bibliogr.: p. 76-82.
Hyopsodus.
Mammals.