1990 Orban Competition Abstracts.  [electronic resource] 

 -  Journal of periodontology  Dec 1990 
 - 773-775 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>1943-3670 
<br/><br/><label>Standard No.: </label>10.1902/jop.1990.61.12.773  doi