A Delmer, V Grandjean, and J.-M Graulich (1972)
Map of coal deposits of Belgium. Explanation of sheet 6 and 10 of the International Map of coal bearing deposits of Europe. 1:2.500.000 (en Russe)
Commission de la carte géologique du monde, vol. p. 45.
17568, .62, .63, .78, .79, 121, 122, 134, 139, 150, 151, 152, 153, 154, Li, Lg, N, Ht, VARCAMP, SYNAM, H, MINCOAL, CARTO
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