1. The Primal Scream;Janov,1971
2. Birth Without Violence;Leboyer,1975
3. Personal communication;Leboyer,1975
4. Curve of Labor as a Screening Device: Early Recognition of Protracted Labor;Glick;Obstet Gynecol,1971
5. Partograms and Nomograms of Cervical Dilatation in Management of Primigravid Labour;Studd;Br Med J,1973