00299nam a22001217a 4500020001800000082001300018100002000031245003600051250001200087260003400099300001300133654003100146  a9781260019414  a618bPOS  aPosner, Glenn D  aOxorn-Foote human labor & birth  a7th ed.  aNew York bMC Graw Hillc2023  a3-862 p.  aObstetrics and Gynaecology