De hierna volgende uiteenzetting over het minder recente verleden is ontleend aan Molle, W. en van Haselen, H. : "Regional disparity and assisted areas in a European Community of Twelve", NEI series 1980/22. ###>The following comments on that period are based on W. Nolle and H. van Haselen, "Regional disparity and assisted areas in a European Community of Twelve", NEI series, 1980/22.