00440nam a2200193Ia 4500 240117s9999||||xx |||||||||||||| ||und|| 81-219-0290-8 B.L/A 621.31 B.L. THERAJA A.K. A TEXTBOOK OF ELECTRICAL TECHNOLOGY VOL 1 THERAJA NEW DELHI S.CHAND & COMPANY LTD 1959 PHYSICS 16355 16355