00392nam a2200145Ia 450000500170000000800410001708200120005810000100007024500390008026000750011930000120019465000160020694200070022299900170022920240821151425.0240821s9999||||xx |||||||||||||| ||und||  a510 NAT  aNCERT 0aMathematics for junior high school  aNew DelhibNational Council of Educational Research and Trainingc1961  aix,346p  aMathematics  cBK  c23065d23065