Arnold O. Beckman (right) and an unidentified man looking at what are likely blueprints or architectural drawings in front of construction equipment.
|View in library catalog|
Cox, Robert. “Arnold O. Beckman with Unidentified Man at Construction Site,” n.d. Beckman Historical Collection, Box 56, Folder 31. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/7w62f824d.
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