00375nam a2200133Ia 4500008004100000020001400041041000800055082001700063100001600080245008200096260004100178300001300219650000900232210716s1989    xx            000 0 und d  a333929306  aeng  a005.362 RAOP  aRao, P V S.  aBasic: elementary, standard and enhanced.bElementary, standard and enhanced.  aNew DelhibMacmillan India Ltdc1989  axiii,213  aNone