TY  - BOOK
AU  - Harris, M. R.
AU  - Lawrenson, P. J.
AU  - Stephenson, J. M.
TI  - Pre-unit systems with special reference to electrical machines
T2  - IEE Monograph 4
SN  - 52107857I
U1  - 621.37 
PY  - 1970///
CY  - Cambridge
PB  - University Press
ER  -