2 1 10 study guide Hoffman, Barbara L Additional Author Horsager, Robin Primary Author Roberts, Scott W Additional Author Rogers, Vanessa L Additional Author Worley, Kevin C Additional Author mixed material 9780071793278 New York McGraw-Hill 2015 Williams_Obstetrics_study_guide_24_ed.jpg Schorge, John O. Editor Hoffman, Barbara L Editor Bradshaw, karen D Editor Haworson, Lisa M Editor mixed material 9780071849081 New York McGraw-Hill 2016 index100.jpg