00469nam a22001457i 4500001001000000005001700010008004100027082001900068100002000087245010800107250001000215260005100225300001700276650003000293SXC01946520260819093650.0260101s1992    ii            000 0 eng d  a425 MUR-E2222  aMurphy, Raymond10aEssential English grammar: Reference and practice for elementary students of English /cMurphy, Raymond  a2 ed.  abCambridge University Press, Cambridge,c1992  ap. ;c22 cm. 0aEnglish structural system