00309nam a2200121Ia 45000030006000000080041000060400015000471000035000622450052000972600009001495460012001580050017001700STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aFridkin, V.M.; Zheludeve, I.S.  aPhoto electrets and electrophoto grapic process  c1966  aEnglish20220125170148.0