00283nam a2200109Ia 4500008004100000020001800041082001500059100002200074245002800096260003700124300001200161190710s9999    xx            000 0 und d  a81-7541-613-0  a372.351 B2  aBanga, Chaman Lal 0aTeaching of mathematics  aDelhibShipra Publicationsc2012  axii,276