Public domain
Washington, D.C., June 30. A new photograph of Walter G. Campbell, of the Food and Drug Administration of the U.S. Department of Agriculture
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineWashington, D.C., June 30. A new photograph of Walter G. Campbell, of the Food and Drug Administration of the U.S. Department of Agriculture. 1939-01-01. Harris & Ewing. Harris & Ewing Collection, Library of Congress. Public domain.
