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Singer JE, Westphal M, Niswander K.Singer JE, et al.Obstet Gynecol. 1968 Mar;31(3):417-23. doi: 10.1097/00006250-196803000-00021.Obstet Gynecol. 1968.PMID: 5639199No abstract available.
Singer JE.Singer JE.Issues Ment Health Nurs. 1985;7(1-4):25-33. doi: 10.3109/01612848509009448.Issues Ment Health Nurs. 1985.PMID: 3854010No abstract available.