E. Paproth, Michiel Dusar, M.J.M. Bless, J. Bouckaert, A. Delmer, M. Fairon-Demaret, E. Houlleberghs, M. Laloux, P. Pierart, Y. Somers, M. Streel, J. Thorez, and J. Tricot (1983)
Bio- and lithostratigraphic subdivisions of the Silesian in Belgium, a review
Ann. Soc. Géol. Belg.(106):241-283.
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