共 27 条
[1]
BEISCHER NA, 1976, OBSTETRICS NEWBORN, P243
[2]
BRIDENBAUGH PO, 1980, NEURAL BLOCKADE, P173
[6]
CARRIE LES, 1980, EPIDURAL ANALGESIA O, P179
[10]
CRAWFORD JS, 1978, PRINCIPLES PRACTICE, P265