J. Bouckaert, M. Coen, Marie Coen-Aubert, and M. Dusar (1974)
Excursion I
In: Guidebook of the International Symposium on Belgian micropaleontological limits from Emsian to Visean, Namur. September 1st to 10th 1974. , ed. by Bouckaert J. & Streel M.. Service Géologique de Belgique. Bruxelles, chap. 1, pp. 19 pp.
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