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Hermann Oberth: Father of Space Travel ... Introduction by H. Oberth. Illustrated with Photographs and Drawings [including Portraits].

Helen Beery WALTERS

出版	New York; Macmillan New York: London, 1962
URL	http://books.google.com.hk/books?id=m3HpMgEACAAJ&hl=&source=gbs_api