Hans Peter Bleuel, Strength Through Joy: Sex and Society in Nazi Germany (London, 1973 [1972]), 199.

Gunnar С. Bohnert, «An Analysis of the Age and Education of the SS Fuhrerkorps 1925 — 1939», Historical Social Research, 12 (1979), 4-17; Friedrich Zipfel, «Gestapo and SD: A Sociographic Profile of the Organisers of the Terror», in Stein U. Larsen et al. (eds.), Who Were the Fascists? Social Roots of European Fascism (Bergen, 1980), 301-11.