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The political and economic relations between the port of Antwerp and the Rhine, 1920-1950 : borders and treaties as obstracles or catalysers for the development of the German-Belgian trade relations
Seberechts, Frank, (2003)
Die wirtschaftliche Integration der Benelux-Staaten
Oberesch, Dieter, (1983)
Benelux : an economic geography of Belgium, The Netherlands and Luxembourg
Riley, Raymond Charles, (1975)