Allen, Don L.. <br/><br/>
Periodontics for the Dental Hygienist /   Textual Documents 

 - 4th ed /   . 
 - Philadelphia :   lea & Febiger ,   1989. 
 - 421 ;   24X18. 
<br/><br/><label>ISBN: </label> 461.10 (Hard Cover) 
<br/><br/><label>Subjects--Index Terms: </label>Periodontology 
<br/><br/><label>Dewey Class. No.: </label>617.632  / ALL