00338nam a2200133 a 450000500170000002000140001708200160003110000140004710000140006124500430007526000410011830000180015963000270017720251202164121.0  a195612701  a428.62bDAS  aDas, B.K.  aDavid, A.  aRemedial course in english for collegs  aDelhibOxford University Pressc1987  a138 p.b24 cm  aStandard English usage