1. Harnapp, G. O.—Monatsschr. f. Kinderh.,69: 1, 1937 as quoted inAm. J. Dis. Child.,45: 214, 1934.
2. Holt andMcIntosh.—Holt’s Pediatrics, 12th Ed. p. 795, 1953.
3. Kneal, E. andSante, L. R.—Am. J. Dis. Child.,81: 693, 1951.
4. Mc Cune, D. J. andBradley C.—Am. J. Dis. Child.,48, 949, 1934.
5. Nussey, A. M.—Arch. Dis. Childhood,13: 161, 1938.