[1]
M.J. van der Meulen, D. Maljers, S.F. van Gessel and S.H.L.L. Gruijters 2007. Clay resources in the Netherlands. Netherlands Journal of Geosciences. 86, (Jul. 2007), 117 - 130. DOI:https://doi.org/10.1017/S001677460002312X.