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SPEERT H, GUTTMACHER AF.SPEERT H, et al. Among authors: guttmacher af.J Am Med Assoc. 1954 Jun 19;155(8):712-5. doi: 10.1001/jama.1954.03690260004002.J Am Med Assoc. 1954.PMID: 13162785No abstract available.
GUTTMACHER AF.GUTTMACHER AF.J Am Med Assoc. 1956 Jun 30;161(9):855-60. doi: 10.1001/jama.1956.02970090081016.J Am Med Assoc. 1956.PMID: 13319020No abstract available.
Guttmacher AF, Vadies EE.Guttmacher AF, et al.J Am Coll Health Assoc. 1972 Dec;21(2):145-8.J Am Coll Health Assoc. 1972.PMID: 4641390No abstract available.