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Norwood TH, Pendergrass WR, Sprague CA, Martin GM.Norwood TH, et al. Among authors: sprague ca.Proc Natl Acad Sci U S A. 1974 Jun;71(6):2231-5. doi: 10.1073/pnas.71.6.2231.Proc Natl Acad Sci U S A. 1974.PMID: 4366757Free PMC article.
Martin GM, Sprague CA.Martin GM, et al. Among authors: sprague ca.Lancet. 1972 Dec 23;2(7791):1370-1. doi: 10.1016/s0140-6736(72)92819-x.Lancet. 1972.PMID: 4118240No abstract available.