1. Sabin, A. B.—Advances in Pediatrics,1: 1, 1942, Ed. byA. G. De Sangtis, Pub. byInterscience Pub. Inc., N.Y., 1942.
2. —Ibid., p. 11.
3. Cathie, I. A. B.—Great Ormond St. J., p. 81, 1955–56, quoted in Year Book of Pediatrics, 1957–1958 series, Ed.S. G. Gellis, p. 124, pub. byThe Year Book Publishers, Chicago.
4. Stillerman, M.—A.M.A.J., Dis. Child.,93: 563, 1957.
5. Borgen, P. H. F., Stan Erichsen andBrynjulv Standal—Acta Paediat.,45: 569, 1956.