Public domain
Research into possibilities of using shortwave radio waves for internal heating of food products in dehydration process is being carried on at the regional agricultural research laboratory. Albany, California
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineResearch into possibilities of using shortwave radio waves for internal heating of food products in dehydration process is being carried on at the regional agricultural research laboratory. Albany, Ca. 1942-01-01. Lee, Russell. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.