ID:DA06132966
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[カール・ケツチゲン述]
[東邦電力] [1929]
Available at 2 libraries
von Carl Köttgen
VDI-Verlag 1926 [3. Aufl]
Available at 3 libraries
VDI-Verlag 1925
Available at 13 libraries
Mittheilung von M. Volkmann, und C. Köttgen
Johannes Bredt 1902
Available at 1 libraries