TY  - BOOK
AU  - Grohmann, Siegfried
AU  - Zastrow, Peter
AU  - Ziemann, Jurgen
TI  - Checking electrical safety measures
SN  - 8173194025
CY  - New Delhi
KW  - electricalengineering
KW  - power system
KW  - protective relays--
KW  - Safety devices --
ER  -