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- By Giovanni Vulpetti, Les Johnson, and [[Gregory L. Matloff]]. Copernicus Books, 2008. ISBN 978-0-387284 B (30 words) - 14:23, 27 October 2014
- author = {Vulpetti, Giovanni and Johnson, Les and Matloff, Gregory L.},23 KB (2,370 words) - 10:21, 17 October 2016
- ...eaming-up-the-future-of-interstellar-travel.html Science Friday interviews Les Johnson] about the future of interstellar travel.296 B (32 words) - 12:02, 25 April 2015
