共 38 条
[1]
APELO R, 1976, FERTIL STERIL, V27, P517
[3]
AZNAR R, 1980, CONTRACEPT DELIV SYS, V1, P143
[4]
BANHARNSUPAWAT L, 1971, OBSTET GYNECOL, V38, P276
[5]
BRENNER PF, 1983, CONTRACEPTION, V28, P135
[6]
BRESLOW NE, 1980, WHO INT AGENCY RES C, V32, P259
[7]
Cole L P, 1983, IPPF Med Bull, V17, P2
[9]
COLE LP, 1984, J REPROD MED, V29, P677