Case 14/76: Reference for a preliminary ruling made by judgment of the Cour d'Appel, Mons (First Chamber), on 9 December 1975 in the case between Les Etablissements A. De Bloos SPRL, Leuze, and la Societe en Commandite par actions 'Bouyer', Tomblaine, Meurthe et Moselle) (France)