TY  - BOOK
AU  - Warrington, Albert Russell van Cortlandt.
TI  - Protective relays: their theory and practice
AV  - TK2861 .W34
U1  - 621.317 
PY  - 1962///-
CY  - New York
PB  - Wiley
KW  - Electric relays
N1  - Includes bibliography & index
ER  -