title: Social class differences in infant mortality: the problem of competing hypotheses.
authors.forename: C
authors.initials: C
authors.lastname: Humphrey
authors.forename: J
authors.initials: J
authors.lastname: Elford
mesh_terms: D000013:Congenital Abnormalities / Q000401:mortality; D004739:England; D006801:Humans; D007223:Infant; D007226:Infant Mortality; D011157:Population Dynamics; D012307:Risk Factors; D012923:Social Class