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Composite of man looking at test tubes, Southern California, 1936 [image]
Tube testing machine, Atwater Kent Radio, Southern California, 1930 [image 2]
Tube testing machine, Atwater Kent Radio, Southern California, 1930 [image 3]
Tube testing machine, Atwater Kent Radio, Southern California, 1930 [image 4]
Tube testing machine, Atwater Kent Radio, Southern California, 1930 [image 6]
Tube testing machine, Atwater Kent Radio, Southern California, 1930 [image 1]
Test tube paternity, 1956
Test tube paternity, 1956
Test tube paternity, 1956
Test tube paternity, 1956
Test tube paternity, 1956
Test tube paternity, 1956
Test tube paternity case, 1956
Test tube paternity case, 1956
Test tube paternity case, 1956
Test tube paternity case, 1956
Test tube paternity case, 1956
Test tube paternity case, 1956
Test tube paternity case, 1956
Test tube paternity case, 1956
Test tube paternity case, 1956
Test tube paternity case, 1956
Test tube paternity case, 1956
Test tube paternity case, 1956
Test tube paternity case, 1956
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