共 10 条
[4]
GOLDZIEHER JW, 1975, AM J OBSTET GYNECOL, V1, P615
[5]
HATCHER RA, 1980, CONTRACEPTIVE TECHNO
[6]
LITT IF, 1985, PEDIATRICS, V75, P693
[7]
LITT IF, 1980, J PEDIATR-US, V96, P742
[9]
SWENSON I, 1980, USE 50 MCG VERSUS SU
[10]
SEXUAL AND CONTRACEPTIVE EXPERIENCE OF YOUNG UNMARRIED WOMEN IN UNITED-STATES, 1976 AND 1971
[J].
FAMILY PLANNING PERSPECTIVES,
1977, 9 (02)
:55-&