title: Period parity progression ratios and birth intervals in England and Wales, 1941-1971: a synthetic life table analysis.
authors.forename: M N
authors.initials: MN
authors.lastname: Bhrolcháin
mesh_terms: D003710:Demography; D049711:History, Modern 1601-; D013223:Statistics as Topic / Q000266:history*; D006113:United Kingdom