M Zelnik. Show Affiliations »
Abstract
Mesh: See more » African AmericansBirth RateFemaleFollow-Up StudiesHumansMarylandPregnancySampling StudiesSeasonsSocial ClassSocioeconomic Factors
Year: 1969 PMID: 5787922
Source DB: PubMed Journal: Milbank Mem Fund Q ISSN: 0026-3745