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"Halley's Comet" Box 4, Folder 15
"The Great Comet of Halley" Box 4, Folder 15
"The Case Against Halley's Comet,", undated Box 4, Folder 18
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Hellman: Comet of, 1577 Box 421
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Percy, Ben. The Comet Cycle. AGBO Box 2354
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LEGION ACADEMY: "A Comet's Tale", 6/11 Box 13, Folder 11
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