Image: Frank W Clarke signature
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Description: Signature of the US chemist Frank W Clarke (1847-1931) (for w:Frank Wigglesworth Clarke)
Title: Frank W Clarke signature
Credit: Original publication: NOAA Photo Collection, U.S. Department of Commerce Immediate source: http://www.photolib.noaa.gov/htmls/pers0079.htm
Author: Frank Wigglesworth Clarke
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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