Lang, K. R., & Whitney, C. (1991). Wanderers in space: Exploration and discovery in the solar system. Cambridge: Cambridge University Press.
Παραπομπή Chicago StyleLang, K. R., and Charles Whitney. Wanderers in Space: Exploration and Discovery in the Solar System. Cambridge: Cambridge University Press, 1991.
Παραπομπή MLALang, K. R., and Charles Whitney. Wanderers in Space: Exploration and Discovery in the Solar System. Cambridge: Cambridge University Press, 1991.
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