000 00323nam a2200121Ia 4500
008 250409s9999 xx 000 0 und d
020 _a81-7381-404-x
082 _a628
_bSAN
100 _aSantra, S. C.
245 0 _aEnvironmental Science
260 _aVidhyanagar
_bNew central book agency, Calcutta
_c2001
365 _a495
999 _c255656
_d255656