Letter from Calvin Bream, Secretary of the Los Angeles Chamber of Commerce Air Pollution Committee, asking Arnold O. Beckman to appear on a radio program discussing air pollution. This series was produced by the Air Pollution Control District as a means of educating the public about smog and about the Chamber of Commerce's plans for fighting it.
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Bream, Calvin E. “Letter from Calvin E. Bream to Arnold O. Beckman,” November 1, 1955. Beckman Historical Collection, Box 1, Folder 30. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/xk81jk39j.
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