L E Kerr. Show Affiliations »
Abstract
Mesh: See more » Coal MiningComprehensive Health CareGroup PracticeInsurance, HealthLabor UnionsRetirementUnited States
Year: 1968 PMID: 5646714 DOI: 10.1056/NEJM196805232782106
Source DB: PubMed Journal: N Engl J Med ISSN: 0028-4793 Impact factor: 91.245