TY  - BOOK
AU  - Shepherd,J.
AU  - Morton,A.H.
AU  - Spence,L.F.
TI  - Higher electrical engineering
SN  - 0273400630
U1  - TK/145 
PY  - 1977///
CY  - London
PB  - Pitman
KW  - Electric engineering.
ER  -