1. The Social Control of Venereal Disease. Report of a National Inquiry of Professional Opinion.;Ennes, H.;Cooperative Studies Publication; Treponematosis." In " Oxford Loose-leaf Medicine,1948
2. Morgan, H. J. (1941). Amer. J. Syph., 25, 233.
3. Cause and Prevention of Disease;Perkins, W.H.,1938