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	1.	No cover image available No cover image available Comets [electronic resource] : characteristics, composition and orbits / Peter G. Melark, editor. by Melark, Peter G ProQuest (Firm) Series: Space science, exploration and policies series Material type: Text; Format: electronic ; Literary form: Not fiction Publication details: Hauppauge, N.Y. : Nova Science Publishers, c2012 Online resources: Click to View Availability: No items available. Add to cart (remove)
	2.	No cover image available No cover image available The exploration of near-earth objects [electronic resource] / Committee on Planetary and Lunar Exploration, Space Studies Board, Commission on Physical Sciences, Mathematics, and Applications, National Research Council. by National Research Council (U.S.). Committee on Planetary and Lunar Exploration ProQuest (Firm) Series: Compass series (Washington, D.C.) Material type: Text; Format: electronic ; Literary form: Not fiction Publication details: Washington, D.C. : National Academy Press, 1998 Online resources: Click to View Availability: No items available. Add to cart (remove)
	3.	No cover image available No cover image available Defending planet Earth [electronic resource] : near-Earth object surveys and hazard mitigation strategies / Committee to Review Near-Earth-Object Surveys and Hazard Mitigation Strategies ; Space Studies Board ; Aeronautics and Space Engineering Board, Division on Engineering and Physical Sciences, National Research Council of the National Academies. by National Research Council (U.S.). Committee to Review Near-Earth-Object Surveys and Hazard Mitigation Strategies National Research Council (U.S.). Space Studies Board National Research Council (U.S.). Aeronautics and Space Engineering Board ProQuest (Firm) Material type: Text; Format: electronic ; Literary form: Not fiction Publication details: Washington, D.C. : National Academies Press, c2010 Online resources: Click to View Availability: No items available. Add to cart (remove)
	4.	Impact! : the threat of comets and asteroids / Gerrit L. Verschuur. by Verschuur, Gerrit L, 1937- [author.] Material type: Text; Literary form: Not fiction Publisher: Oxford, [England] : Oxford University Press, 1997Copyright date: �1996 Online resources: Click to View Availability: No items available. Add to cart (remove)

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