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Robert L. Hallett, Consultant on Tin, Metals and Minerals Section, Office of Production Management (OPM). Chief Chemist of National Lead Company
Public domain

Robert L. Hallett, Consultant on Tin, Metals and Minerals Section, Office of Production Management (OPM). Chief Chemist of National Lead Company

Dixon, Royden, United States. Office For Emergency Management · 1940-01-01 · photo, print, drawing

From the collection of Library of Congress. Free to download, adapt and use — no permission needed.

Credit lineRobert L. Hallett, Consultant on Tin, Metals and Minerals Section, Office of Production Management (OPM). Chief Chemist of National Lead Company. 1940-01-01. Dixon, Royden, United States. Office For Emergency Management. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.

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