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Robert L. Hallett, Consultant on Tin, Metals and Minerals Section, Office of Production Management (OPM). Chief Chemist of…
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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. Sourced from the Library of Congress.

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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. Sourced from the Library of Congress.

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