000 00221nam a22000977a 4500
082 _a891.2
_bAGA/K
100 _aAgarwal, L S
245 _aKalachakram /
_cL S Agarwal
260 _aDelhi :
_bH R D,
_c1989.
942 _2ddc
_cBK
999 _c715048
_d715048