Child, G.W. "On Marriages of Consanguinity." In Medico-Chirurgical Review, Apr. 1862, pp. 461-471. London.

Dally, E. "Rapport sur les mariages consanguins." In Bulletins de la Société d'Anthropologie. Paris, 1877.

"Recherches sur les mariages consanguins et sur les races pures." In Bulletins de la Société d'Anthropologie. Paris, 1863.

Darwin, G.H. "Marriages of First Cousins in England and Their Effects." In Journal of the Statistical Society of London, vol. 38. London, 1875.

Dean, L.W. The Influence of Consanguinity on the Organs of Special Sense. Chicago, 1903.

De Lapouge, G.V. Les Selections Sociales. Paris, 1896.

Dugdale, R.L. Jukes: a Study in Crime, Pauperism, Disease and Heredity. New York, 1877.

Duesing, C. "Das Geschlechtsverhaeltnis der Geburten in Preussen." In Staatswissenschaftliche Studien, vol. iii, pp. 373-454. Jena, 1890.

Die Regulierung des Geschlechtsverhaeltnisses bei der Vermehrung der Menschen, Tiere und Pflanzen. Jena, 1884.

Fay, E.A. Marriages of the Deaf in America. Washington, Volta Bureau, 1898.