Public domain
Parke, Davis and Company, manufacturing chemists, Detroit, Michigan. Checking the leg bones of rachitic rats in testing vitamin deficiencies
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineParke, Davis and Company, manufacturing chemists, Detroit, Michigan. Checking the leg bones of rachitic rats in testing vitamin deficiencies. 1943-01-01. Siegel, Arthur S.. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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