共 26 条
[3]
BARRETT J, 1981, OB GYN SURVEY
[6]
CASPI E, 1973, OBSTET GYNECOL, V42, P388
[8]
FLEISCHER A, 1981, PRINCIPLES PRACTICE, P263
[9]
FLEISCHER A, SO MED J
[10]
FLEISCHER A, CLIN ULTRASOUND