000 00284nam a2200133Ia 4500
100 _aGopal,Brij.
365 _b16
942 _cBK
654 _a
245 _aElements of ecology
260 _aNew Delhi
_bVikas Publishing House
_c1981
082 _a574.5
300 _bHb
_a6,(2),200
999 _c386759
_d386759
041 _aeng