00289nam a22000857a 4500100003800000245008200038260003000120300001200150700004100162  aChandio, Akhtar Hussain Ra87EL04  aTechnical Study of Aprotection System for an Under Ground Distribution System  aNawabshah:bQUEST,c1992.  a121p. ;  aDepartment of Electrical Engineering