000 00284nam a2200109Ia 4500
008 240421s9999 xx 000 0 und d
100 _aBhalla, G.S
245 0 _aEnvironment, Economics and Commerce Education
260 _aNew Delhi
_bDeep & Deep
_c2004
300 _a257p.
942 _cBK
999 _c14557
_d14557