000 00276nam a2200109Ia 4500
008 221226s9999 xx 000 0 und d
041 _aeng
082 _a501
_bCUL
100 _aGull, R.G
_91419757
245 _aConcepts of Science
260 _aNew Delhi
_bWiley Eastern Limited
999 _c915963
_d915963