TY  - GEN
AU  - Kretzmann, Reinhard
TI  - Industrial electronics : Introduction to modern industrial electronical practice / 
U1  - 621.381,KRE 
PY  - 1953///
CY  - Holland, 
PB  - Netherland, 
KW  - Kretzmann Reinhard
KW  - Telecom engineering
N1  - Part 1. The Tubes and their Basic Circuits (Page-5), Part 2.  Electronic  Devices for Industrial Purpose (Page-85), 3.conclusion (Page-220)
ER  -