| Appeared in | Book Many Worlds of Magnus Ridolph (The) 1966 |
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| Appeared in | Book Many Worlds of Magnus Ridolph (The) 1980 |
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| Appeared in | Book Complete Magnus Ridolph (The) 1985 |
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| Appeared in | Magazine Startling Stories Mar 1949 |
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| Appeared in | Anthology Blast Off: SF for Boys 1969, Harrison, Faber |
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| Appeared in | Anthology Worlds of Wonder 1969, Harry Harrison, Doubleday |
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