00253nam a2200097Ia 4500008004100000082001600041100001300057245003000070260004600100300000900146210430s9999    xx            000 0 und d  a530 H1571 P  aHalliday  aPhysics volum 1cHalliday  aIslamabadbNational Book Foundationc2000  a566p