Lewis, J. S. (1996). Rain of iron and ice: The very real threat of comet and asteroid bombardment. Addison-Wesley.
Citace podle Chicago (17th ed.)Lewis, John S. Rain of Iron and Ice: The Very Real Threat of Comet and Asteroid Bombardment. Reading, Mass: Addison-Wesley, 1996.
Citace podle MLA (9th ed.)Lewis, John S. Rain of Iron and Ice: The Very Real Threat of Comet and Asteroid Bombardment. Addison-Wesley, 1996.
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