1. Digging up Bones. The Excavation, Treatment and Study of Human Skeletal Remains;Brothwell,1972
2. Palaeodemography and earlier British populations;Brothwell;World Archaeology,1972
3. Evidence of population change and variability in the British Isles;Brothwell,1974
4. Skara Brae. A Pictish Village in Orkney;Childe,1931
5. Crania Britannica;Davis,1865