Appletons'_Youmans_Edward_Livingston_signature.png
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| Description | Signature of United States science popularizer Edward Livingston Youmans | ||
| Date | published 1889 | ||
| Source | Appletons' Cyclopædia of American Biography , v. 6, 1889, p. 642 | ||
| Author | E. L. Youmans | ||
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Permission
( Reusing this file ) |
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