Public domain
Proctor [i.e. Procter] and Gamble Distributing Company, Cincinnati, Ohio. Checking pressure during the glycerine distilling process
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineProctor [i.e. Procter] and Gamble Distributing Company, Cincinnati, Ohio. Checking pressure during the glycerine distilling process. 1943-01-01. Hollem, Howard R.. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.