000			00288nam a2200133Ia 4500
100			_aVaidya, Narendera
365			_b12.5
942			_cBK
654			_a
245			_aProblem solving in science
260			_aDelhi _bS. Chand & Company _c1968
082			_a375.5
300			_bHb _axi,188
999			_c402089 _d402089
041			_aeng