000 00261nam a22000977a 4500
999 _c332247
_d332247
020 _a8174930116
082 _bDHA
245 _aPrinciples of agricultural ecology
_c Dhaliwal G S and Kler D S
260 _aBombay:
_bHimalaya Publishing House,
_c1995.
942 _cBK