1. Pritchard JA, MacDonald PC: Williams Obstetrics. Appleton, Century, Crofts, New York, 1976, p. 463?465
2. Wynn R: Obstetrics and Gynecology, The Clinical Core. Lea and Febiger, Philadelphia, 1975, pp. 82?84
3. Hertig AT, Sheldon WH: Hydatidiform mole: A pathological-clinical correlation of 200 cases. Am J Obstet Gynecol 53:1?36, 1947
4. Curry SL, Hammond CB, Tyrey L, Creasman WT, Parker RT: Hydatidiform mole: Diagnosis, management and longterm followup of 347 patients. Obstet Gynecol 45:1?8, 1976
5. Park WW, Lees JC: Choriocarcinoma. Arch Pathol 49:205?219, 1950