J L Simon, D B Smith. Show Affiliations »
Abstract
Mesh: See more » GeographyHumansImmunizationNew YorkRespiratory Tract DiseasesStatistics as TopicStudent Health Services/statistics & numerical dataTime FactorsUniversities
Year: 1973 PMID: 4686968 DOI: 10.1097/00005650-197301000-00007
Source DB: PubMed Journal: Med Care ISSN: 0025-7079 Impact factor: 2.983