00285nam a2200121 a 450000500170000002000150001708200210003210000160005324500250006925000110009426000380010530000200014320251203091515.0  a0521407397  a539.721,bD, hug  aHughes, I.S  aElementary particles  a3rd ed  aCambridgebUniversity Pressc1991  axxii,432p, 22cm