1. Aggeler, P. M., and Lucia, S. P. (1944). J. nerv. ment. Dis., 99, 475.
2. Hemophilia: Clinical and Genetic Aspects, Illinois med;Birch, C.L.;dent. monogr; Personal communication,1937
3. Cs;Brachfeld, K.; Hrodek, 0;Pediat; Leading article,1958
4. Creveld, S. Van, Hoorweg, P. G., and Stijn, R. W. (1957). Arch. chir. neerl., 9, 263.
5. Douglas, A. S., and McAlpine, S. G. (1956). Scot. med. J., 1, 270.