H.A. van Adrichem-Bogaert, N. Witmans, C.C. de Ruyter, P.W. Bosch, and M.C. Geluk (1999)
Geological Atlas of the Subsurface of the Netherlands. Explanation to map sheet XV Sittard - Maastricht.
Netherlands Institute of Applied Geosciences TNO - National Geological Survey, vol. p. 1-127.
25710, .49, .94, .79, .93, .94, 107, 108, 109, Li, Lg, RVGMEUSE2, SYNVE, CAMP34, 1, 2, 3, 4, CARTO, SON, LOG, COALI, NEOTEC, GEOPHYS, PALGEO, HYDRO, STRA
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