No n specified (1969)
Plain of Focant. Synthesis of geological,hydrogeological and geotechnical studies.
Geological Survey of Belgium, vol. June 13th 1969 p. 10 p. + ann.
15761, 184, 185, N, SYNDIN, FA, F, DEVSUP, SON, CARTO, HYDRO, TEC, INGSTA, PHYSSCH
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