共 6 条
[3]
FRIEDMAN EA, 1961, OBSTET GYNECOL, V17, P135
[4]
FRIEDMAN EA, 1978, LABOR CLIN EVALUATIO, P45
[5]
FRIEDMAN EA, 1967, LABOR CLIN EVALUATIO, P34
[6]
HENDRICKS CH, 1970, AM J OBSTET GYNECOL, V106, P1965