000 00329nam a2200145Ia 4500
100 _aSingh, Y.K..
020 _a81-7648-909-3
365 _b795
942 _cBK
654 _a
245 _aTeching Of Environmental science
260 _aNew Delhi
_bAPH Publishing Corporation
_c2005
082 _a370:574.5
300 _ax,366
999 _c402987
_d402987
041 _aeng