Map of countries with members of the European Centre for Workers’ Questions (Europäisches Zentrum für Arbeitnehmerfragen, EZA)
Base map from File:Blank map of Europe (without disputed regions).svg by Nordwestern (cc-by-sa-4.0) and source for countries with EZA members from File:EZA-Länder 201210.jpg by Europäisches Zentrum für Arbeitnehmerfragen (cc-by-sa-3.0-de - OTRS ticket #2013040910006161)
This file by Seagull123, a derivative work of files by Nordwestern and Europäisches Zentrum für Arbeitnehmerfragen