On 10 March 1951, the industrial journal L’Usine belge reports on the concern of the national industrial federations of the six countries involved in the Schuman Plan, in particular regarding the powers of the future High Authority of the European Coal and Steel Community.

On 19 March 1951, Louis Pierson writes to Fernand Dehousse, a Belgian Socialist Senator and a very active pro-European militant, to protest against the attitude in the Belgian coal industry and the Government towards the Schuman Plan.

On 21 June 1950, commenting on the opening of negotiations on the Schuman Plan in Paris, the French Communist daily newspaper L’Humanité deplores the agreement between French, German and American employers to set up a cartel for the manufacture of weapons and the exploitation of workers from Western Europe.

On 24 June 1950, the French Communist daily newspaper L’Humanité reports on the negotiations taking place in Paris for the establishment of the coal and steel pool and deplores the secrecy surrounding the discussions.

On 15 January 1951, the French trade union bulletin Politique extérieure et Action ouvrière publishes a detailed report on the political and economic issues surrounding the implementation of the Schuman Plan.

On 17 April 1951, in an article in the French daily newspaper Le Populaire, Socialist leader Paul Ramadier comments on the results of the negotiations between the Six for the implementation of the Schuman Plan and identifies the positive aspects and the weaknesses of the draft treaty establishing the European Coal and Steel Community (ECSC).

On 15 November 1950, in an article in the French Communist daily newspaper L’Humanité, Henri Jourdain, General Secretary of the International Union of Miners (WFTU), urges the workers of Europe to reject the Schuman Plan, which he describes as an instrument of war at the service of the United States.

In December 1950, the journal Fédération publishes the report on the Schuman Plan that was prepared one month earlier by the Belgian Charles Baré, Managing Director of the Walloon Economic Council, for the third Congress of the Union of European Federalists (UEF) in Strasbourg.

In July 1950, the French journal Le Guide du métallurgiste publishes the text of a lecture given a few days earlier in Paris by Ambroise Croizat, Secretary-General of the Federation of Metalworkers, on the economic and social threats that the Schuman Plan might pose for the working class in the coal and steel sectors.

On 20 November 1950, the French Christian Democratic daily newspaper L’Aube outlines the economic and social issues surrounding the Schuman Plan.