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Ball RM, Freeman S, James FC, Bermingham E, Avise JC.Ball RM, et al.Proc Natl Acad Sci U S A. 1988 Mar;85(5):1558-62. doi: 10.1073/pnas.85.5.1558.Proc Natl Acad Sci U S A. 1988.PMID: 16593914Free PMC article.
Ball RM.Ball RM.Home Health Care Serv Q. 1986 Fall-Winter;7(3-4):1-49. doi: 10.1300/J027v07n03_01.Home Health Care Serv Q. 1986.PMID: 10301271No abstract available.