1
by Böhme, S., Fricke, W., Güntzel-Lingner, U., Henn, F.
Published 1972
Springer Berlin Heidelberg
... of Electrical Engineers, UK...

2
by Böhme, S., Fricke, W., Güntzel-Lingner, U., Henn, F.
Published 1973
Springer Berlin Heidelberg
... of Electrical Engineers, UK...