Nyst, P. H. (1852). In Lyell, C.: On the Tertiary Strata of Belgium and French Flanders. Part II, p. 301. <em>The Quarterly Journal of the Geological Society of London.</em> 8.[details]
original descriptionNyst, P. H. (1852). In Lyell, C.: On the Tertiary Strata of Belgium and French Flanders. Part II, p. 301. <em>The Quarterly Journal of the Geological Society of London.</em> 8.[details]
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