P Van Rooijen (1987)
Hydrogeological investigation in the OPAC-borehole near Geverik. Red. T. Krans & H. van de Laar,Heerlen,Geological Bureau,May 8-9th,1987
Meuse-Rhine Euregio Geologists Meeting, vol. p. 18.
18655, .79, VARCAMP, CARB, DIN, HYDRO, SON
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