000 00272nam a2200109Ia 4500
008 230911s9999||||xx |||||||||||||| ||und||
020 _a9789393682260
100 _aSingh, S.K Singh, S.P
245 0 _aEnvironmental Science
260 _bAKN Leaning Delhi
_c2023
300 _a290
999 _c8472
_d8472