1909. The Expressions of Emotion in the Pigeons. I. The Blond Ring-Dove (Turtor risorius). Jour. Comp. Neurol. and Psychol., Vol. XIX, pp. 30-80.
Dawson, J.
1911. The Biology of Physa. Behavior Monographs, Vol. I, No. 4, pp. 1-120.
Behavior is related to the natural environment.
Davis, H. B.
1907. The Raccoon: A Study in Animal Intelligence. Amer. Jour. Psychol., Vol. XVIII, pp. 447-489.
Dean, B.
1892. The Physical and Biological Characteristics of the Natural Oyster Grounds of South Carolina. Bull. U. S. Fish Comm. for 1890, Vol. X, pp. 335-361.
Contains good illustrations of the oyster habitat.
Dimon, A. C.