Hibbard, Bryan M. <br/><br/>
Principles of obstetrics / 
Bryan M. Hibbard ; with contributions by M. Rosen and O.P. Gray ; with illustrations by Susan Cull. 
 - London ;  Boston :  Butterworths,  1988. 
 - vii, 818 p. :  ill. (some col.) ;  26 cm.