Rn̲tgen, Wilhelm Conrad, 1845-1923
Wilhelm Rn̲tgen correspondence concerning the purchase of vacuum tubes, 1896.
Wilhelm Rn̲tgen correspondence concerning the purchase of vacuum tubes for the Physical Institute of the Bayerische Julius Maximilians-Universitt̃ W rzburg.
Vacuum-tubes.
Bayerische Julius Maximilians-Universitt̃ W rzburg.
AIP-ICOS
American Institute of Physics. Niels Bohr Library & Archives. One Physics Ellipse, College Park, MD 20740, USA