TY - BOOK AU - Williams, J. Whitridge (John Whitridge) AU - Gilstrap, Larry C. AU - Cox, Susan M. AU - Brekken, Alvin L. AU - Cunningham, F. Gary TI - Study guide for Williams obstetrics ET - 20th ed. / Larry C. Gilstrap ... [et al.] PB - Appleton & Lange PY - 1997 EP - vii, 270 p. UR - https://ci.nii.ac.jp/ncid/BA42078380 SN - 083859641X ER -