Variable Star Observing Groups Whose Members Contribute Data to the 
AAVSO International Database include:


Agrupacion Astronomica de Sabadell (Spain)
American Association of Variable Star Observers (AAVSO)
Asociacion de Variabilistas de Espagne (Spain)
Association Francaise des Observateurs d'Etoiles Variables (AFOEV)
Association of Variable Star Observers "Pleione"  (Russia)
Astronomical Society of Southern Africa, Variable Star Section
Astronomischer Jugendclub (Austria)
Astronomisk Selskab (Scandinavia)
Brazilian Observational Network REA
British Astronomical Association, Variable Star Section
Bundesdeutsche Arbeitsgemeinschaft fur Veranderliche Sterne e.V. (BAV) (Germany)
Grupo Astronomico Silos (Zaragoza, Spain)
Israeli Astronomical Association, Variable Star Section
Liga Ibero-Americana de Astronomia (South America)
Madrid Astronomical Association M1 (Spain)
Magyar Csillagaszati Egyesulet, Valtozocsillag Szakcsoport (Hungary)
Nederlandse Vereniging Voor Weer-en Sterrenkunde, Werkgroep Veranderlijke Sterren (Netherlands)
Norwegian Astronomical Society, Variable Star Section
Red de Observadores (Montevideo, Uruguay)
Royal Astronomical Society of Canada
Royal Astronomical Society of New Zealand, Variable Star Section
Sociedad Astronomica "Syrma" (Valladolid, Spain)
Svensk Amator Astronomisk Forening, variabelsektionen (Sweden)
Ukraine Astronomical Group, Variable Star Section
Unione Astrofili Italiani (Italy)
URSA Astronomical Association, Variable Star Section (Finland)
Variable Star Observers League in Japan
Vereniging Voor Sterrenkunde, Werkgroep Veranderlijke Sterren (Belgium)