A Star Shall Fall
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Comet Lore: Halley's Comet In...
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A Star Shall Fall
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Halleys Komet
Tammann,
Veron
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A Star Shall Fall
Marie Brennan, Pro
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Heart of the Comet
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Exploration of Halley's Comet
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A Star Shall Fall
Marie Brennan, Pro
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Comet
Carl Sagan,
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Heart of the Comet
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Comet
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Luck Follows Me
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Heart of the Comet
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Comets: Speculation and...
Stephen F Pollard,
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Heart of the Comet
Gregory Benford,
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Heart of the Comet
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Wandering Star
Steven Yount
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Comets
Dr. Franklyn M Branley
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Comet
Carl Sagan,
Ann Druyan
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Halley's Comet Almanac, 1986
Franklin Institute,
Philadelphia Daily News
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Tales of the Comet:...
Douglas Campbell,
John Higgins
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Ritchie David : Comets: the...
David Ritchie
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Halley's Comet
Peter Wragg
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Comets
Dr. Franklyn M Branley
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