1. Population Statistics in the Kingdom of Dahomey;Human Biology,1932
2. Some Aspects of Dahomean Ethnology;Herskovits;Africa,1932
3. Stayt Hugh A. , The Bavenda, pp. 143–4; p. 170.
4. Meek , op. cit., pp. 209–10, also remarks the presence of this custom among the Dinka in connection with the passage from his book just quoted.
5. C. G. and Seligman B. Z. , Pagan Tribes of the Nilotic Sudan, pp. 164–5