A Comparative Analysis of Space Colonization Enterprises
Publisher
Springer Netherlands
Reference3 articles.
1. Ball, J. A., 1973, Icarus 19, 347.
2. Drake, F. D., 1980, in “Strategies for the Search for Life in the Universe”, ed. M. Papagiannis, D. Reidel, p. 27.
3. Newman, W. I. and Sagan, C. 1981, Icarus 46, 293.
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