1. British Surgical Practice: Surgical Practice 1952,;AIRD, I.;London, Butterworth Med. Publns,1952
2. Surg;BARNES, J.P.;Gynec. Obstet,1947
3. BENSON, C. D., and SHARPE, H. R. (1950), Arch. Surg., 6I, 822.
4. BENSON, C. D., CARPENTER, W. S., and SWEDENBURG, R. D. (1953), Ann. Surg., 137, 26i. CONWAY, D. J., and DAWSON, R. C. G. (X949), Brit. med. Y., ii, 1153.
5. DENNIS, C. (1947), Ann. Surg., 126, 788.