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Title: Studies in vegetational history in honour of Knud Jessen, 29th November 1954.
Description: [Danmarks Geol. Unders., II. R., 80.] Copenhagen. Large 8v9. Pp. 308, 1 portr., 9 pls. of photos, 12 fold. pls. of pollen diagrs., many illus. in text, refs. Orig. wrs. - Collection of 16 papers, nearly all in Engligh, arranged under 7 headings: technique (1), comprehensive (2), Tertiary (1), Interglacial (1), Late Glacial (5), Postglacial (4), History of plants and weeds (2).

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