1. Bristol, L.M. (1915). Social Adaptation: A Study in the Development of the Doctrine of Adaptation as a Theory of Social Progress. Cambridge, MA: Harvard University Press.
2. Cohen, A. (2016). ‘Harvard’s Eugenics Era’. Harvard Magazine, March–April. https://www.harvardmagazine.com/2016/03/harvards-eugenics-era.
3. Dorfman, J. (1949). The Economic Mind in American Civilization. Volume 3. New York: Viking.
4. Dorfman, J. (1959). The Economic Mind in American Civilization. Volumes 4 and 5. New York: Viking.
5. Editor (1962). ‘Thomas Nixon Carver, 1865–1961’. Journal of Farm Economics, 44(1): 260.