1. EPILEPSY IN THE WAPOGORO TRIBE IN TANGANYIKA
2. C. H. Alstrom, A Study of Epilepsy in its Clinical, Social and Genetic Aspects , Munksgaard, Copenhagen, 1950 , 284 pp.
3. Incest Behavior and Incest Taboo
4. C. Bagley, Social Structure and Prejudice in Five English Boroughs , Institute of Race Relations, London, 1970 , 89 pp.