Dolezal, E. (1969). Conquest of space. Abelard-Schuman.
Tohutoru Kātū Chicago (17th ed.)Dolezal, Erich. Conquest of Space. London: Abelard-Schuman, 1969.
Tohutoro MLA (9th ed.)Dolezal, Erich. Conquest of Space. Abelard-Schuman, 1969.
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