The economic significance of the Rhine-Main-Danube waterway
Seiler, E. (1972). The economic significance of the Rhine-Main-Danube waterway. Bull. Perm. Int. Assoc. Navig. Congr. 46(11): 51-53
In: Bulletin of the Permanent International Association of Navigation Congresses = Bulletin de l'Association Internationale Permanente des Congrès de Navigation. PIANC/PIANC = AIPCN: Bruxelles. ISSN 0374-1001, meer
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