Walther, D. P. (David Philippe) <br/><br/>
Walther and Houston's orthodontic notes / 
D.P. Walther 
 - [Place of publication not identifed] :  [publisher not identified],  c1994 
<br/><br/> Houston, Walther 
<br/><br/><label>ISBN: </label>723610053 
<br/><br/><label>LC Class. No.: </label>RK 521 .W237 1994