Author: BOUCKAERT, J. ET AL.
Title: Biostratigraphic chart of the Famennian stage (upper Devonian) in the type localities of Belgium; a preliminary report.
Description: - 1969. Journal of Paleontology Vol.43; 727-734, 1 fig. 2 plts. h.t. with spores, 1 plt. h.t. with stratigr.table folding-out. Orig. extract, stapled, very good.

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