Köhler, Jacob Willem |
Absolute measurement of the time constant of resistors / by J.W.L.Köhler and C.G. Koops. |
[S.l. : s.n., 1947?] |
Köhler, Jacob Willem |
A new alternating current bridge for precision measurements / by J.W.L. Köhler and C.G. Koops. |
[S.l. : s.n., 1946?] |
Koops, C.G. |
On the dispersion of resistivity and dielectric constant of some semiconductors at audiofrequencies / C.G. Koops. |