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Publicado por The American Philosophical Society, Philadelphia PA, 1959
Librería: Book Booth, Berea, OH, Estados Unidos de America
Hardcover. Condición: Reading Copy. ex-library copy with usual markings, most of spine strip missing but page binding still tight, small piece of cloth from front edge also missing, rest of covers have minor wear and rubbing, 64 pages, study of the spectrum of a binary star system - Beta Lyrae, bw illustrations, tables and graphs; complete title: The Spectrum of Beta Lyrae Transactions of the American Philosophical Society Held at Philadelphia for Promoting Useful Knowledge New Series - Volume 49, Part 1 Size: 9.25 x 11.75.