00386nam a2200121Ia 450000500170000000800410001708200160005810000580007424500640013226000270019630000140022365000270023720240821160211.0240821s9999||||xx |||||||||||||| ||und||  a510 NAT(TB)  aNational Council of Educational Research and Training 0aMathematics : a textbook for secondary schools for class IX  aNew DelhibNCERTc1975  axix, 368p  aMathematics - Textbook