1. Lehmann, H., Storey, P., and Thein, H., Brit. Med. J., i, 544 (1956).
2. Na-Nakorn, S., Minnich, V., and Chernoff, A. I., J. Lab. Clin. Med., 47, 490 (1956).
3. Brumpt, L., Brumpt, V., Coquelet, M. L., and De Traverse, D. M., Rev. Hemat., Paris, 13, 21 (1958).
4. Lie-Injo Luan Eng, Nature, 176, 695 (1956).
5. Lehmann, H., and Singh, R. B., Nature, 178, 695 (1956).