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nitrogen determination apparatus

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Knoxville, Tennessee (Tennessee Valley Authority (TVA)). Nitrogen determination apparatus in TVA research at University of Tennessee

Knoxville, Tennessee (Tennessee Valley Authority (TVA)). Nitrogen dete...

Public domain photograph - working class people, the 1930s United States, work, labor, worker, free to use, no copyright restrictions image - Picryl description

Knoxville, Tennessee (Tennessee Valley Authority (TVA)). Nitrogen determination apparatus in TVA research at University of Tennessee

Knoxville, Tennessee (Tennessee Valley Authority (TVA)). Nitrogen dete...

Public domain photograph - working class people, the 1930s United States, work, labor, worker, free to use, no copyright restrictions image - Picryl description

Knoxville, Tennessee (Tennessee Valley Authority (TVA)). Nitrogen determination apparatus in TVA research at University of Tennessee

Knoxville, Tennessee (Tennessee Valley Authority (TVA)). Nitrogen dete...

Annotation on original negative jacket. Title and other information from caption card. Transfer; United States. Office of War Information. Overseas Picture Division. Washington Division; 1944. More information ... More