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Vendeur : Antiquariaat Wim de Goeij, Kalmthout, ANTW, Belgique
Membre d'association : ILAB
2. Karlsruhe, Verlag G. Braun, 1968, in-8°, (16)nn pp + 710 pp, index, bibliography, publisher's cloth with printed dustwrapper. Wrapper with some wear but a fine copy. Text in German. Scientific study on the use of electrical propulsion for space travel. Buch auf Deutch.