Jim Burns. Cover art for Jack Williamson's Lifeburst.

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Jim Burns. Cover art for Jack Williamson's Brother to Demons, Brother to Gods.

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Jack Williamson, The Cometeers, Sphere, 1979. Cover uncredited, could be Colin Hay but unproven. First published 1936 in Astounding Stories. Legion of Space series no. 2.

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Frederik Pohl & Jack Williamson, Survival Kit, Pan, 1976. Cover: Bob Layzell. Cuckoo series no. 1. Fixup of the novella "Doomship" (1973) and the serial "The Org's Egg" (1974)

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