Signorella, A <br/><br/>
Coil springs.  [electronic resource] 

 -  JPO: the journal of practical orthodontics  Mar 1968 
 - 132-5 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>8755-4852 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Dentistry<br/>Orthodontic Appliances<br/>Orthodontics, Corrective