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Hydropolis : the role of water in urban planning : proceedings of the international UNESCO-IHP workshop, Wageningen (The Netherlands) and Emscher region (Germany), March 29-April 2, 1993 / ed. Hans van Engen, Dietrich Kampe, Sybrand Tjallingii.
Leiden : Backhuys, 1995.
295 p. : ill., graphs, maps, tabs ; 24 cm.