General view of an unidentified employee examining a bobbin from a drawtwister used for the production of Zefran, an acrylic fiber, at the Dow Chemical Company's Textile Research Laboratory located in Pittsburg, California.
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Dow Chemical Company. “Zefran Textile Research Laboratory,” 1956. Dow Chemical Company Historical Image Collection, Box Oversized Plants 1. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/bc386j68h.
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