File:Richards Theodore William graph.jpg

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	06:06, 29 December 2007	No thumbnail	809 × 454 (177 KB)	Astrochemist	{{Information \|Description = Graph of periodic properties \|Source = Journal of the American Chemical Society, volume 37, issue 7 \|Date = 1915 \|Author = Theodore William Richards \|Permission= \|other_versions= }} Category:History of chemistry

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