Perio / 
prepared by Office of Information, Division of Dental Health. 
 - [Washington, D.C.,  1971] 
 - [12] p. :  ill. 
<br/><br/> [Additional illustrations on p. 2-3 of cover].  Document for sale by the Superintendent of Documents, paper, 30c.  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