共 21 条
[2]
COOPER DL, 1975, OBSTET GYNECOL, V45, P565
[3]
JAIN A, 1977, STUD FAMILY PLANN, V8, P26
[4]
JAIN AK, 1975, ANAL INTRAUTERINE CO, P3
[5]
KOSONEN A, 1978, FERTIL STERIL, V30, P59
[8]
LUUKKAINEN T, 1979, ANN CLIN RES, V11, P121
[9]
LUUKKAINEN T, 1975, ANAL INTRAUTERINE CO, P243
[10]
MISHELL DR, 1975, ANAL INTRAUTERINE CO, P27