Ekers, R. D. books & textbook

SETI 2020: A Roadmap for the Search for Extraterrestrial Intelligence

Cullers, D. Kent Billingham, John Ekers, R. D.

S E T I Pr /2002-02-01 Paperback / 602 Pages
isbn-10: 0966633539 / isbn-13: 9780966633535