(1850-1970) ; Action anthropique ; Dune ; Ecologie ; Géographie de l'Europe ; Géomorphologie ; Hydrologie ; Littoral ; Milieu naturel ; Pays-Bas ; Système dunaire ; Végétation
1850. Some of the changes have natural causes, most changes were induced by man. Maps on a scale 1:100.000 indicate the present ecological, geomorphological, hydrological and vegetational situation as well the changes in the period 1850-1970. (ALS).