00580 a2200217 4500 ITTG653 OSt 20250115011551.0 241215s1962 |||||||||||||||||| #d ITTG ITTG spa 621.31913 K47 KERCHNER, RUSSELL M. CIRCUITOS DE CORRIENTE ALTERNA/ RUSSELL M. KERCHNER, GEORGE F. CORCORAN. MEXICO: CECSA 1962 699 P. 24 CM. 6 1.CORRIENTES ALTERNAS. CORCORAN, GEORGE F. ddc 1 20090813 14:22:53 634 634 0 0 ddc 0 0 1 1 GEN 2009-08-13 1 621.31913 K47 10628 2026-03-27 12:55:50 2026-03-24 ej.3 2025-01-15 1 0 0 ddc 0 0 1 1 GEN 2010-02-15 0 621.31913 K47 21286 2025-01-15 07:15:51 ej.6 2025-01-15 1