narrower
A hand in our own bosom : water quality in the Delfland Water Board 1888-2003Midden-Delfland : development plan for open space : outline reportLandscape protection and creation of a meadow landscape reserve within the Hague-Rotterdam-Hoek van Holland triangle by means of a regional planMid-Delfland Reconstruction [1979].Holland-under-Waterland; the district water boardsDelfland maps highlighted