00270pam a2200121 a 4500020000500000041000500005082001500010100003200025245004400057250001500101260002200116300001000138  c  h  a618.2bCUN  aCunningham Gary  ,eAuthor.  aWilliams Obstetrics hTextual Documents  a23rd ed. .  bMcGraw-Hillc2010  a1385.