1. Inheritance and Disease;Bell,1940
2. Frequency of cousin marriages;Bramwell;Genealogists' Mag,1939
3. Note on estimates of the inbreeding coefficient through study of pedigrees and isonymous marriages;Cabello;Hum Biol,1991
4. The Anglo-Saxons;Campbell,1982
5. 3000 Years of Urban Growth;Chandler,1974