00334    a2200121   4500020001500000082001300015100001900028245004600047260005100093300001700144650003200161700001900193  a0195620542  a425bTHO  aThomson, A. J.  aA practical English grammar bexercises 1  aNew DelhibOxford University pressc1961g2001  a181p.c23cm.  aGrammar of standard English  aMartinet, A.V.