U M Cowgill, H B Johnson. Show Affiliations »
Abstract
Mesh: See more » AgricultureBirth RateDelivery, ObstetricEdible GrainFemaleFertilityFood SupplyHistory, 18th CenturyHumansInfant MortalityMaleMarriagePortugalPregnancyRural PopulationSex RatioVital Statistics
Year: 1971 PMID: 4938044 DOI: 10.1017/s0021932000008099
Source DB: PubMed Journal: J Biosoc Sci ISSN: 0021-9320