TY  - BOOK
AU  - Elgerd, Olle I.
TI  - Electric energy systems theory: an introduction
T2  - McGraw-Hill Electrical and electronic engineering series
U1  - S/C-S/T D66,1 L1;12 
PY  - 1971///
CY  - New York
PB  - McGraw-Hill
ER  -