"watkins, a j. "
electrical installations calculations volume 3: / a.j. watkins - 3 ed. - uk : butterworths 1999. - "viii, 189p.; 22 cm."
0-340-73186-9
electrical installation--
621. 31 jen
electrical installations calculations volume 3: / a.j. watkins - 3 ed. - uk : butterworths 1999. - "viii, 189p.; 22 cm."
0-340-73186-9
electrical installation--
621. 31 jen