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Forest Products Laboratory, Madison, Wissonsin. Dr. R.O. Marts in his laboratory. He is using an Ultropak microscope for the detection of obscure defects in airplane veneer
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Credit lineForest Products Laboratory, Madison, Wissonsin. Dr. R.O. Marts in his laboratory. He is using an Ultropak microscope for the detection of obscure defects in airplane veneer. 1942-01-01. Delano, Jack. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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