REFERENCES
- Bassily, S., Farid, Z., El Masry, N. A. & Miner, W. F. (1976). Transactions of Royal Society of Tropical Medicine and Hygiene, 70, 88.
- Coutinho, A. & Barreto, R. F. (1969). Annals of New York Academy of Sciences, 160, 612–623.
- Daniels, J. C., Warren, K. S. & David, J. R. (1975). Journal of Immunology, 115, 1414–1421.
- Farid, Z., Bassily, S., Young, S. W., El Masry, N. A. & Hassan, A. (1973). Journal of the Egyptian Medical Association, 56, 358–362.