1. Hammond, C. B., Schmidt, H. J., and Parker, R. T.: Gestation trophoblastic disease, in Gynecologic Oncology, McGowan, p. 287.
2. Effects of methotrexate upon choriocarcinoma and chorioadenoma;Li,1956
3. Treatment of metastatic trophoblastic disease: Good and poor prognosis;Hammond;Am. J. Obstet. Gynecol,1973
4. Treatment of trophoblastic tumors;Bagshawe;Am. Acad. Med. (GB),1976
5. Hammond, C. B., and Suciu, T. N.: Preferable management of gestational trophoblastic disease. Controversy OB-Gyn (In press).