000 00276nam a2200121Ia 4500
008 230222s9999 xx 000 0 und d
082 _a624
100 _aRaghavan Nambiar K
245 0 _aTextbook of Environmental Studies
250 _a1
260 _bIbm
_c2007
942 _cBK
999 _c31324
_d31324