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Hundreds of Alien and UFO Books! Enjoy! |
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| Yamakoshi, K. (1994). Extraterrestrial dust: laboratory studies of interplanetary dust. Tokyo; Dordrecht; London, Terra Scientific Pub. Co.: Kluwer Academic. |
| Yenne, B. (1997). U.F.O: evaluating the evidence. London, Grange. |
| Young, R. S., R. B. Painter, et al. (1965). An analysis of the extraterrestrial life detection problem. Washington, D.C., NASA Scientific and Technical Information Division. |
| Zemach, E. M. (2000). Kolot zarim: sipurim. Tel-Aviv, ha-Kibuts ha-me'uhad. |
| Zinsstag, L. and T. Good (1983). George Adamski: the untold story: the latest and most complete evidence on the first man to claim that extraterrestrials live among us. Beckenham, Ceti. |
| Zubrin, R., R. Wagner, et al. (1997). The case for Mars: the plan to settle the Red Planet and why we must. London, Simon & Schuster. |
| Zuckerman, B. and M. H. Hart (1995). Extraterrestrials: where are they?. Cambridge; New York, Cambridge University Press. |