De Souza, ., & Foust, B. (1979). World space economy. Charles E. Merrill.
Chicago-čujuhus (17. p.)De Souza, , juo Brady Foust. World Space Economy. Columbus, Ohio: Charles E. Merrill, 1979.
MLA-čujuhus (9. p.)De Souza, , juo Brady Foust. World Space Economy. Charles E. Merrill, 1979.
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