1. Some congenital deformities of rectum, anus, vagina and urethra (Hunterian Lecture);Browne;Ann. Roy. Coll. Surg. Eng.,1951
2. Imperforate anus;Nixon,1966
3. Anterior sacral meningocoele;Amacher;Surg. Gynec. Obstet.,1968
4. Congenital absence of sacrum and coccyx: Report of cases and review of literature;Freedman;Brit. J. Surg.,1950
5. Agenesis of the sacrum;Williams;Surg. Gynec. Obstet.,1957