00413nam 2202529 45000010005000000030023000050050009000280080041000370820008000780720032000860200018001181000012001362600025001482450025001736500032001986500015002302529StarLibrary Marc Built20180420201711 ||||| |||||||||||amh  a621 aTelephone Switching Systems a0-444-68448-2 agrinsec bNORTH-HOLLAND c1983 aElectronic switching aTelephone Switching Systems aElectronic