Author: Du Rietz, G.E. (et al.), 1939.:
Title: Zur Kenntnis der Vegetation des Sees Tåkern. [Acta Phytogeogr. Suec., 12.]
Description: Uppsala. Large 8vo. Pp. 65, 13 photos on 7 pls., 4 figs. Orig. wrs.

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