Johnson, J E <br/><br/>
A consideration of the present-day philosophy of the Johnson twin-wire mechanism.  [electronic resource] 

 -  Report of the congress. European Orthodontic Society  1969 
 - 397-412 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Dentistry<br/>Malocclusion--therapy<br/>Orthodontic Appliances<br/>Orthodontics, Corrective<br/>Philosophy