New York, D. Van Nostrand, 1929. 8vo. Publishers cloth. No jacket. With dedication, on front free end paper, from the author to the mathematician Harald Bohr (brother to physicist Niels Bohr). X,255 pp. A fine and clean copy.
Reference : 31341
First edition.
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Cambridge, N.Y., 1947. Royal8vo. Orig. full cloth. XVI,416 pp.