W M Castle, W F Ross, W Sheffield. Show Affiliations »
Abstract
Mesh: See more » AbsenteeismAdultAfrican AmericansAfrican Continental Ancestry GroupAge FactorsEthnic GroupsFemaleHumansMaleMiddle AgedMorbidityOccupationsPostal ServiceRespiratory Tract Infections/epidemiologySeasonsSex FactorsWounds and Injuries/epidemiologyZimbabwe
Year: 1974 PMID: 4423334
Source DB: PubMed Journal: S Afr Med J