References
- Thoday, , J. M. 1969 . “ ‘Limitations to Genetic Comparison of Populations’ in ‘Biosocial Aspects of Race’ ” . In J. Biosoc. Sci. Supplement , No. 1 Edited by: Harrison , G. A. and Peel , J.
- 1961 Census , 16 – 16 . Table 3
- 1969 . Registrar General's Statistical Review of England and Wales, 1967, Part II, Tables, Population 178 – 178 . London Table QQ(c)