Παραπομπή APA
European Commission. (2001). 50 years at the service of miners and the coal industry. Luxembourg: Office for Official Publications of the European Communities.
Παραπομπή Chicago StyleEuropean Commission. 50 Years At the Service of Miners and the Coal Industry. Luxembourg: Office for Official Publications of the European Communities, 2001.
Παραπομπή MLAEuropean Commission. 50 Years At the Service of Miners and the Coal Industry. Luxembourg: Office for Official Publications of the European Communities, 2001.
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