Pratt, W T .
Worked examples in electrical engineering / Textual Documents W T Pratt. - 3 / . - London : Hutchinson , 1962. - 263 ; .
621.3 / PRA/WA
Worked examples in electrical engineering / Textual Documents W T Pratt. - 3 / . - London : Hutchinson , 1962. - 263 ; .
621.3 / PRA/WA