Harvold, Egil P., <br/><br/>
The activator in interceptive orthodontics 

 - Saint Louis,  C. V. Mosby Co.,  1974. 
 - x, 229 p.  ill. 
<br/><br/><label>ISBN: </label>0801620945 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Orthodontics, Interceptive.<br/>Orthodontics, Preventive.
<br/><br/><label>LC Class. No.: </label>MED.RK521  / .H35