J C Norman. Show Affiliations »
Abstract
Mesh: See more » African Americans/historyGovernmentHistory, 17th CenturyHistory, 18th CenturyHistory, 19th CenturyHistory, 20th CenturyPersonal Health ServicesRace Relations/historyRural PopulationSocial ConditionsUnited StatesUrban Population
Year: 1969 PMID: 4900237 DOI: 10.1056/NEJM196912042812304
Source DB: PubMed Journal: N Engl J Med ISSN: 0028-4793 Impact factor: 91.245