Author: CONRAD, W.:
Title: Sur la faune et la flore d'un ruisseau de l'Ardenne belge. [Mém. Mus. Roy. Hist. Nat. Belg., 99.]
Description: Bruxelles 1942. Folio. Pp. 177,[5], 18 photos on 2 plates, 21 diagrs., bibliogr., index of species. Orig. printed wrappers, uncut. Wear to ends of spine, contents very good.

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