000 00284nam a2200121Ia 4500
008 240125s9999||||xx |||||||||||||| ||und||
041 _aeng
082 _a523.02
_bT18 GUP
100 _aRanjan, Kumar
_916537
245 0 _aChemical elements
260 _bKumar Gupta
_c2018
942 _cBK
999 _c28063
_d28063