000 00300nam a22001097a 4500
008 131231b xxu||||| |||| 00| 0 eng d
020 _a9788180697746
050 _a363.7
100 _aSingh R P
245 _aEnvironmental studies
_cZubairul Islam
260 _aNew Delhi
_bConcept publishing comp.
_c2012
999 _c328667
_d328667