000			003480000a22001450004500
001			EST
003			621.316 / R81
004			M
006			m
100			_aRubin, Murry
100			_aHaller, C. E.
245			_aCommunication switching systems
650			_a<ENERGIA ELECTRICA><DISTRIBUCION DE LA ENERGIA><REDES DE DISTRIBUCION>
999			_c14990 _d14990