000 00314nam a2200121Ia 4500
008 221001s1990 xx 000 0 eng d
082 _a301.3 SHA
100 _aSharma, B. L.
245 0 _aParyavaran niyojan evam paristhitikiya vikas
260 _aAgra
_bSahitya Bhawan
_c1990
300 _a312p.
942 _2ddc
_cBK
999 _c23107
_d23107