1. Astley, R., and Parsons, C. G. (1952). Brit. Heart J., 14, 13.
2. Congenital Heart Disease;Brown, J.W.,1950
3. Campbell, M., and Hills, T. H. (1950). Brit. Heart J., 12, 83.
4. Cooley, R. N., Sloan, R. D., Hanlon, C. R., and Bahnson, H. T. (1950). Radiology, 54, 848.
5. Donzelot, E., Durand, M., Metianu, C., and Vlad, P. (1950). Arch. Mal. Coeur, 43, 577.