Patric Jacobs and Frans De Coninck (1992)
Qualitative clay mineralogy of the Middle and Upper Eocene in north-western Belgium
Tertiary Research, vol. 14 (2) p. 61-72.
13457, .24, .38, .39, .41, .42, .72, .87, W, O, VB, BRAB3, EOC, MINER, PHYSA, CHIM, STRA
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