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| John D. Clark, Ph.D: Science Fiction Technology and Ideas |
| John Drury Clark, Ph.D. (b. 1907 – d. 1988) was an American science fiction writer, rocket fuel developer, chemist. During his last two years at Caltech his college roommate was L. Sprague de Camp.
 (John Drury Clark)
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| Invention/Technology | Source Work (Publication Date) |
|
Antron |
Minus Planet (1937) |
|
Atomic Drill |
Minus Planet (1937) |
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