000 00309cam a2200145 4500
999 _c402
_d402
082 _a548 GUR
100 1 _aGurtu,J.N
100 1 _aGurtu ,Sunaina
245 1 0 _aCrystalline State
260 _aIndia
_bPragati
_c1970
300 _a31p
650 0 _acrystalline
650 0 _aaromatic substitiution
942 _cBK