000 00313nam a2200133Ia 4500
008 230118s9999||||xx |||||||||||||| ||und||
082 _a540
082 _bTHO/P
100 _aprof.a.o
_bthomas
245 0 _aperiodic table of elements
260 _acannanore
260 _bscientific book centre
260 _c1987
999 _c11736
_d11736