Moscucci, Ornella. The Science of Woman: Gynaecology and Gender in England, 1800-1929. Cambridge University Press, 1990.
70
Towler, Jean. Midwives in History and Society. Croom Helm, 1986.
160
Moscucci and Towler give different percentages for manufacturing towns. However, as Moscucci refers to the primary souce, her figures have been provided.