共 89 条
[1]
Andrews W C, 1971, Obstet Gynecol Surv, V26, P477, DOI 10.1097/00006254-197107000-00001
[2]
[Anonymous], 1973, Lancet, V1, P1399
[3]
BAILEY J, 1973, EVALUATION REPORT RU
[6]
BOYCE JG, 1972, OBSTET GYNECOL, V40, P139
[7]
BRYANT J, 1969, HEALTH DEVELOPING WO
[8]
Cartwright Ann, 1970, PARENTS FAMILY PLANN
[9]
CHOPRA JG, 1972, AM J CLIN NUTR, V25, P1202
[10]
CHULACHARIT E, 1972, J OBSTET GYN BR COMM, V79, P657