1. 1. J. R. WILSON Endome trial studies on 141 patients wearing intrauterine device, included 35 carcinoma in situ of cervix. Amer. Gynec. Meeting, Feb.1965 .
2. 2. G. PINCUS, 1964 . Excerpta Med. Intl. Cong. Series No. 86.
3. 4. E. TYLER "50% endome trial pathology" in women wearing device. Personal communication, Feb.1966 .