Founding members (10 January 1920):
Argentina, Belgium, Bolivia, Brazil, British Empire, United Kingdom, Australia, Canada, India, New Zealand, South Africa, Chile, China, Colombia, Cuba, Czechoslovak, El Salvador, Denmark, France, Greece, Guatemala, Haiti, Honduras, Italy, Japan, Liberia, Netherlands, Nicaragua, Norway, Panama, Paraguay, Persia, Peru, Poland, Portugal, Romania, Siam, Spain, Sweden, Switzerland, Uruguay, Venezuela, Yugoslavia
