R Swennen, W De Vos, J Ebbing, R Hindel, J Schalich, and I Van Keer (1993)
Pristine background values in heavyly industrialized areas : a geological approach. Leuven - Belgium, 4th & 5th June 1993
Meuse-Rhine Euregio Geologists Meeting, vol. p. 4 p.
09980, .17, .17, .47, .48, .78, 109, 121, 134, 135, 159, 228, Li, A, Lg, HAINE, REC, PEDO, CHIM, ENV, CARTO
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