Perio. 

 - [Revised 1972.] 
 - [Washington, D.C.,  1973] 
 - [11] p. :  ill. 
<br/><br/> DHEW publication (NIH) 73-403; Division of Dental Health.  Document for sale by the Superintendent of Documents, paper, 40c.  Oblong 24mo.  CRDP Program Historic Shelflist record. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Teeth--Care and hygiene.
<br/><br/><label>GPO Item No.: </label>0507-D-01 
<br/><br/><label>Gov. Doc. Class. No.: </label>HE 20.3102:P 41/972