Public domain
Control laboratory. Shown here are the distillation units in the control laboratory where various tests are made in the production of butadiene
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineControl laboratory. Shown here are the distillation units in the control laboratory where various tests are made in the production of butadiene. 1935-01-01. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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