000			003430000a22001450004500
001			EST
003			621.395 / N64 / 1991
004			M
006			m
100			_aNoll, A. Michael
245			_aIntroduction to telephones and telephone systems
047			_a0-89006-550-0
650			_a<TELEFONIA><HISTORIA DE LA TELEFONIA>
999			_c20099 _d20099