Authors: Coppée, G. --- Houberechts, A. --- Lehmann, G. --- Mosinger, Michel --- Pierquin, L. --- et al. Policard, A. --- Vigliani, E. --- Zorn, O --- Antweiler, H --- Degueldre, G --- Hoeksema, P. E. --- Jouasset, D --- Lambert, P. --- Menger, H. --- Patigny, I. --- Schiller, E. --- Starlinger, H. --- Vidali, Umberto --- Wenzel, H. G. --- Weuthen, P. --- European Coal and Steel Community
Year: 1961 Publisher: Luxembourg : [éditeur non identifié],