共 12 条
[2]
FRIEDMAN EA, 1974, OBSTET GYNECOL, V43, P178
[6]
KARIM SMM, 1971, J OBSTET GYN BR COMM, V78, P289
[7]
LAUERSEN NH, 1974, OBSTET GYNECOL, V44, P793
[8]
NEUTRA R, UNPUBLISHED