On the occasion of Expo 58, the European Coal and Steel Community (ECSC) created its first official flag. ...  Its six stars represented the six Member States, while the black and blue colours in the background referred to the coal and steel industries respectively. (Source: The European Community at EXPO 58 : a virtual vision to the pavillon, 2023)

Brad Allard. In: The Journey to Modern Europe: Evolution of the European Union, (2), 2016

Edited by Gordon L. Weil. Published in co-operation with the European Community Information Service, Washington, D. C. by Frederick A. Praeger, 1965.

This work is a compendium of institutional and policy information concerning the evolution of the European Common Market. It consists of excerpts from Community documents, most often from the annual reports of the Commission, introduced by the editor's remarks. (Source : American Journal of International Law, vol. 60 (1966), page 620 )