Griffith, G.T. (1926). Population Problems of the Age of Malthus. Cambridge University Press.
2.
Habakkuk, H.J. (1952). English Population in the Eighteenth Century. Economic History Review, VI, 117.
3.
McKeown T. and Brown, R.G. (1955). Medical Evidence Related to English Population Changes in the Eighteenth Century. Population Studies. (in press).
4.
Gibson, J.R. and McKeown, T. (1952). Observations on all Births (23970) in Birmingham, 1947. VII. Effect of Changing Family Size on Infant Mortality. Brit. J. Soc. Med., 6, 183.
