共 8 条
[3]
DOH AS, 1987, ANN U SC SANTE, V4, P463
[4]
Green C P, 1978, Popul Rep Spec Top Monogr, P37
[5]
KOUAM L, 1994, CONTRACEPT FERTIL S, V22, P167
[6]
PATERSON PJ, 1972, MER S AUST, V3, P312
[8]
TOWNSEND S, 1990, FHI NETWORK, V11, P1