Public domain
Dr. H.J. Dutton, assistant chemist, runs a spectrometric test for determination of carotene content of dehydrated vegetables. Regional agricultural research laboratory, Albany, California
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineDr. H.J. Dutton, assistant chemist, runs a spectrometric test for determination of carotene content of dehydrated vegetables. Regional agricultural research laboratory, Albany, California. 1942-01-01. Lee, Russell. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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