Author: Iversen, J., & Troels-Smith, J., 1950.:
Title: Pollenmorfologiske definitioner og typer. / Pollenmorphologische Definitionen und Typen. [Danmarks Geol. Unders., IV. R., 3(8).]
Description: Copenhagen: C.A. Reitzel. Large 8vo. Pp. 52,[2], numerous figs. on 15 plates, 1 fold. diagr. Orig. wrappers.

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