The American association of variable star observers 
AAVSO                                                        
 - U.S.A  AAVSO 
 - [various pagings.] 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy<br/>Variable stars
<br/><br/><label>Universal Decimal Class. No.: </label>084.4:524.33  / AAV