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Published 1860
Other Authors: ';
“...Helmholtz, Hermann <<von>> 1821-1894...”
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Published 1860
Other Authors: ';
“...Helmholtz, Hermann <<von>> 1821-1894...”
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by Helmholtz, Hermann <<von>> 1821-1894
Published 1865
Other Authors: ';
“...Helmholtz, Hermann <<von>> 1821-1894...”Published 1865
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