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.
First edition.
New York, Van Nostrand Compagny, 1929, grand in 8° relié pleine toile verte de l'éditeur, XIV-476 pages ; un tableau dépliant.
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