000			00360cam a2200169ua 4500
001			9627
008			140513n ii |||gr||||Z||||||eng
040			_aMAIN
041			_aEnglish
082			_bPUR
100			_aPurkayastha,G.
245			_aEnvironmental Studies
250			_a1st.
260			_aDelhi: _bKalyani Publishers.
300			_a349.
942			_cBK
999			_c9613 _d9613