00446nam a22001457a 4500003001200000005001700012008004100029020000600070040001200076082001500088100001600103245014700119260001100266650002300277NUST - PNEC20170116180929.0150904b        xxu||||| |||| 00| 0 eng d  a-  cLIBRARY  a621.31 SON  aSoni, M. L.  a A course in electrical power : covering generation, transmission, distribution, utilization, traction, switchgear and protection,cM. L. Soni  cc.1976  aElectric powerxEE