000 00260nam a2200109Ia 4500
082 _a333.7 RAG/E
100 _aRaghavan Nambiar, K
245 0 _aCourse Book on Environmental Studies.
260 _bNalpat Publishers, Kochi
_c2009
300 _a321p
942 _cBK
999 _c38680
_d38680