Nitrogen_determination_apparatus,_part_of_research_conducted_during_World_War_II_by_the_Tennessee_Valley_Authority_and_the_University_of_Tennessee,_1942.jpg
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Summary
Description Nitrogen determination apparatus, part of research conducted during World War II by the Tennessee Valley Authority and the University of Tennessee, 1942.jpg |
English:
Nitrogen determination apparatus, part of research conducted during World War II by the Tennessee Valley Authority and the University of Tennessee.
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creator QS:P170,Q711226
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Licensing
Public domain Public domain false false |
This image is a work of an employee of the United States Farm Security Administration or Office of War Information domestic photographic units, taken as part of that person's official duties. As a work of the U.S. federal government , the image is in the public domain in the United States. See Copyright . |