00261nam a22000977a 450000500170000000800410001702000150005804000080007324500480008126000340012920200923142733.0200923b           ||||| |||| 00| 0 eng d  a071954632x  cCML  aPractical Electronics for GCSE.cBishop, O.  aLondonbJohn Murray Ltdc1989