00298nam a2200109Ia 450000500170000000800410001708200160005810000170007424500480009126000410013930000080018020260224040845.0260224s9999||||xx |||||||||||||| ||und||  a621.312 SYM  aSymonds, A.  0aElectrical power equipment and measurements  aLondon: Asia Publishing House c1980  a307