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2. Remote measurement of ground movements by surveying techniques;Ashkenazi;Civil Eng. Survey.,1980
3. Eurogauge: The West European Tide Gauge Monitoring Project;Ashkenazi,1994
4. Actual geodetic monitoring of land subsidence: The changing concept of the German North Sea Coast Levelling Net;Augath,1995
5. Monitoring landslide movement with a 35 mm camera;Ballantyne;Transport. Res. Rec.,1988