FAI Gliding CommissionW
FAI Gliding Commission
German Air Sports AssociationW
German Air Sports Association
Kennemer Zweefvlieg ClubW
Kennemer Zweefvlieg Club
National Socialist Flyers CorpsW
National Socialist Flyers Corps
Royal Air Force Gliding & Soaring AssociationW
Royal Air Force Gliding & Soaring Association
Soaring Association of CanadaW
Soaring Association of Canada
Soaring Society of AmericaW
Soaring Society of America
Soaring Society of South AfricaW
Soaring Society of South Africa