000 00313nam a2200133Ia 4500
008 200615s9999||||xx |||||||||||||| ||und||
020 _a8188646792
082 _a581
_bECO-S
100 _aSINGH,HR
245 0 _aECOLOGY AND ENVIRONMENTAL SCIENCE
250 _a1ST
260 _aNEW DELHI
_bVPC
_c2018
942 _cBK
999 _c31270
_d31270