共 23 条
[1]
CHALMERS JA, 1977, J INT MED RES, V5, P72
[3]
Crist T, 1973, N C Med J, V34, P792
[4]
ETHINYL ESTRADIOL AND CONJUGATED ESTROGENS AS POST-COITAL CONTRACEPTIVES
[J].
JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION,
1980, 244 (12)
:1336-1339
[5]
HALL MN, 1974, J AM COLL HEALTH ASS, V22, P395
[7]
HENDERSON KM, 1980, FERTIL STERIL, V33, P550