20th Anniversary of the United Nations Educational, Scientific and Cultural Organization (UNESCO), founded 16 November 1945, London, United Kingdom.
Afghanistan
Albania
Algeria
Antigua
Argentina
Ascension
The Bahamas
Barbados
Bermuda
Bolivia
Brazil
British Solomon Islands
Brunei
Burundi
Cambodia
Cameroun
Cayman Islands
Central African Republic
Ceylon > Sri Lanka
Chad
Republic of the Congo
Cyprus
Czechoslovakia
Dahomey > Benin
Dominica
El Salvador
Ethiopia
Finland
Gabon
Ghana
Gibraltar
Gilbert & Ellice Islands > Kiribati & Tuvalu
Greece
Grenada
Guatemala
Guinea
Haiti
Hong Kong
Hungary
Iran
Iraq
Ivory Coast
Japan
Jordan
Kenya, Uganda, Tanzania
Kuwait
Republic of Korea
Laos
Lesotho
Libya
Madagascar
Maldives
Mali
Mauritania
Mauritius
Mexico
Monaco
Morocco
Mongolia
Montserrat
New Caledonia
New Hebrides > Vanuatu
Niger
Nigeria
Pakistan
Pitcairn Islands
Rwanda
Ryukyu Islands > Japan
St Kitts Nevis Anguilla
St Helena
St Vincent
Saudi Arabia
Seychelles
Somalia
Federation of South Arabia > Yemen
Syria
Swaziland > Eswatini
Thaliand
Togo
Tristan da Cunha
Tunisia
Turkey
Turks & Caicos Islands
Upper Volta > Burkina Faso
Republic of Vietnam > Vietnam
Virgin Islands
Wallis & Futuna
Kingdom of Yemen > Yemen
Yugoslavia