Berryman, J.(2002). Challenge to Apollo: The Soviet Union and the space race, 1945–1975. Space Policy, 18(1), 75-76. doi:10.1016/s0265-9646(01)00065-0
MLA CitationBerryman, John. "Challenge to Apollo: The Soviet Union and the Space Race, 1945–1975". Space Policy, 18.1 ( 2002 ): 75-76.
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