E. O. Callen

发表

Plant Remains in Some Coprolites from Utah

P. S. Martin, E. O. Callen, 1969, American Antiquity.

Prehistoric Diet Revealed in Coprolites

T. Cameron, E. O. Callen, 1960 .

Food habits of some pre-columbian Mexican Indians

E. O. Callen, Author E. O. Callen, 1965, Economic Botany.

The First New World Cereal

E. O. Callen, 1967, American Antiquity.

STUDIES IN THE GENUS LOTUS (LEGUMINOSAE): I. LIMITS AND SUBDIVISIONS OF THE GENUS

E. O. Callen, 1959 .

The Morphology, Cytology, and Sexuality of the Homothallic Rhizopus sexualis (Smith) Callen

E. O. Callen, 1940 .