Public domain
Collecting. Process collection tank containing butadiene. From these tanks the liquid is pumped to the spherical storage tanks shown in picture number 5
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineCollecting. Process collection tank containing butadiene. From these tanks the liquid is pumped to the spherical storage tanks shown in picture number 5. 1935-01-01. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.