000 00318nam a2200133Ia 4500
008 160316s1987 xxu||||| |||| 00| 0 eng d
020 _a
100 _aJ.B. Lal
245 _aEnvironmental Conservation
250 _a1st
260 _aDEHRADUN
_bINTERNATIONAL BOOKS DISTRIBUTORS
_c1987
300 _a111
700 _a
_a
999 _c11531
_d11531