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Johns CJ, Macgregor MI, Zachary JB, Ball WC.Johns CJ, et al. Among authors: macgregor mi.Ann N Y Acad Sci. 1976;278:722-31. doi: 10.1111/j.1749-6632.1976.tb47087.x.Ann N Y Acad Sci. 1976.PMID: 1067052
MacGregor MI, Block AJ, Ball WC Jr.MacGregor MI, et al.Johns Hopkins Med J. 1970 May;126(5):279-95.Johns Hopkins Med J. 1970.PMID: 5419916No abstract available.