File:Humboldt W. Leverenz 3420.jpg

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Humboldt W. Leverenz at the RCA David Sarnoff Research Laboratories with the Periodic Chart of the Elements that he developed, June 1962. Copyright held by the IEEE.

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current17:14, 19 May 2009Thumbnail for version as of 17:14, 19 May 2009336 × 428 (74 KB)SHH (talk | contribs)Humboldt W. Leverenz at the RCA David Sarnoff Research Laboratories with the Periodic Chart of the Elements that he developed, June 1962. Copyright held by the IEEE. For more information, see IEEE GHN Image Policy.
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