Vaux, Norris Wistar,  1881- <br/><br/>
The mechanics of obstetrics, 
by Mario A. Castallo. 
 - Philadelphia,  F. A. Davis,  1948. 
 - xii, 217 p.  ill. 
<br/><br/> Earlier editions by Norris W. Vaux and Mario A. Castallo. 
<br/><br/><label>LCCN: </label>med48001375  
<br/><br/><label>LC Class. No.: </label>RG524  / .V3 1948 
<br/><br/><label>National Library of Medicine Call No.: </label>WQ 100  / V386m 1948