TY  - BOOK
AU  - Singh,L P
TI  - Digital protection: : Protective relaying from electromechanical to microprocessor
SN  - 81-224-0594-0
PY  - 1994///
CY  - New Delhi: 
PB  - Wiley Eastern Ltd, 
KW  - Digital protection
KW  - Polyphase relays
ER  -