Pierre Werner, Eugène Schaus, Théo Lefèvre and Paul-Henri Spaak at the signing of the protocol revising the BLEU Convention (Brussels, 29 January 1963)
ImageSource and copyright
Source: Archives familiales Pierre Werner, Luxembourg. 1952-1959, PW 200.
Bruxelles: Belga, 29.01.1963. Noir et blanc.
Copyright: (c) Belga Photo / Images Globe