共 8 条
[2]
Chesley L C, 1966, Clin Obstet Gynecol, V9, P871, DOI 10.1097/00003081-196612000-00003
[5]
GILSTRAP LC, 1978, SEMIN PERINATOL, V2, P73
[6]
HAUTH JC, 1976, OBSTET GYNECOL, V48, P253
[8]
WORLEY RJ, 1978, SEMIN PERINATOL, V2, P15