Allen, Don L. <br/><br/>
Periodontics for the dental hygienist / 
Don L. Allen 
 - [Place of publication not identifed] :  [publisher not identified],  c1986 
<br/><br/> Periodontics for the dental hygienist, Periodontics 
<br/><br/><label>ISBN: </label>812110471 
<br/><br/><label>LC Class. No.: </label>RK 361 .A37 1986