00286nam a2200121Ia 4500008004100000082000800041082001000049100001700059245004700076260001000123260002200133260000900155230118s9999||||xx |||||||||||||| ||und||  a620  bBHA/S  aK.B.bbhatia 0aStudy of electrical appliances and devices  adelhi  bkhanna publishers  c1979