TY - BOOK AU - Williams, J. Whitridge (John Whitridge) AU - Cunningham, F. Gary AU - MacDonald, Paul C. AU - Gant, Norman F. TI - Williams obstetrics ET - 18th ed. / F. Gary Cunningham, Paul C. MacDonald, Norman F. Grant PB - Prentice-Hall International PY - 1989 EP - viii, 984 p. UR - https://ci.nii.ac.jp/ncid/BA13424626 SN - 0838597378 ER -