Measuring illegitimate fertility.
Goose
Nigel
N
D004739:England; D005298:Fertility; D049669:History, 16th Century; D049670:History, 17th Century; D049671:History, 18th Century; D049672:History, 19th Century; D006801:Humans; D007086:Illegitimacy / Q000266:history* / Q000706:statistics & numerical data; D012042:Registries / Q000706:statistics & numerical data*