000 00315nam a2200133Ia 4500
008 190710s9999 xx 000 0 und d
020 _a81-7488-563-3
082 _a546 Ar67P
100 _aArora, M G
245 0 _aP- block elementd
260 _aNew Delhi
_bAnmol Publicatios
_c1997
300 _a291
942 _cBK
999 _c28261
_d28261