000 00273nam a2200109Ia 4500
008 200527s9999||||xx |||||||||||||| ||und||
082 _a507 VAI
100 _aNarendera Vaidya
245 0 _aProblem Solving in Science
264 _bS. Chand and Company
_c1968
300 _a188p.
999 _c15225
_d15225