Proffit, William R. <br/><br/>
Contemporary orthodontics / 
William R. Proffit 
 - [Place of publication not identifed] :  [publisher not identified],  c1993 
<br/><br/> Contemporary orthodontics, Contemporary 
<br/><br/><label>ISBN: </label>801663938 
<br/><br/><label>LC Class. No.: </label>RK 521 .P76 1993