McGarvey, Michael R.; Mullan, Fitzhugh; Sharfstein, Steven S. (1968-07-11). "A Study in Medical Action — The Student Health Organizations". New England Journal of Medicine. 279 (2): 74–80. doi:10.1056/NEJM196807112790205. ISSN0028-4793. PMID5657015.
McGarvey, Michael R.; Mullan, Fitzhugh; Sharfstein, Steven S. (1968-07-11). "A Study in Medical Action — The Student Health Organizations". New England Journal of Medicine. 279 (2): 74–80. doi:10.1056/NEJM196807112790205. ISSN0028-4793. PMID5657015.
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McGarvey, Michael R.; Mullan, Fitzhugh; Sharfstein, Steven S. (1968-07-11). "A Study in Medical Action — The Student Health Organizations". New England Journal of Medicine. 279 (2): 74–80. doi:10.1056/NEJM196807112790205. ISSN0028-4793. PMID5657015.