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Engineering students in a laboratory, The University of Iowa, 1939

Engineering students in a laboratory, The University of Iowa, 1939

Engineering students operating electrical engineering department broadcast controls, 1939

Engineering students operating electrical engineering department broadcast controls, 1939

Engineering students operating electrical engineering department broadcast controls, 1939

Engineering students operating electrical engineering department broadcast controls, 1939

Engineering student working with high voltage equipment in a laboratory, The University of Iowa, 1939

Engineering student working with high voltage equipment in a laboratory, The University of Iowa, 1939

Engineering students in a laboratory, The University of Iowa, 1939

Engineering students in a laboratory, The University of Iowa, 1939

Engineering student handling fragile equipment in a laboratory, The University of Iowa, 1939

Engineering student handling fragile equipment in a laboratory, The University of Iowa, 1939

Engineering student handling fragile equipment in a laboratory, The University of Iowa, 1939

Engineering student handling fragile equipment in a laboratory, The University of Iowa, 1939

Engineering students in a laboratory, The University of Iowa, 1939

Engineering students in a laboratory, The University of Iowa, 1939

Engineering student recording data in a technology laboratory, The University of Iowa, 1939

Engineering student recording data in a technology laboratory, The University of Iowa, 1939

Engineering student working in a technology laboratory with a telephone, The University of Iowa, 1939

Engineering student working in a technology laboratory with a telephone, The University of Iowa, 1939