共 10 条
- [2] 3-YEAR CLINICAL-TRIAL WITH LEVONORGESTREL SILASTIC IMPLANTS [J]. CONTRACEPTION, 1979, 19 (06) : 557 - 573
- [4] KREAGER P, 1977, RES ACTION INT PLANN, V3
- [6] NILSSON CG, 1981, FERTIL STERIL, V35, P304
- [7] NORPLANT - REVERSIBLE IMPLANT CONTRACEPTION [J]. STUDIES IN FAMILY PLANNING, 1980, 11 (7-8) : 227 - 235
- [8] SIVIN I, UNPUB 3 YEAR COMP ST
- [9] 1978, CONTRACEPTION, V18, P315
- [10] 1978, CONTRACEPTION, V18, P335