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Barta O, Barta V, Shirley RA, McMurry JD.Barta O, et al. Among authors: shirley ra.Zentralbl Veterinarmed B. 1975 Apr;22(3):254-62. doi: 10.1111/j.1439-0450.1975.tb00585.x.Zentralbl Veterinarmed B. 1975.PMID: 773049No abstract available.