000 00274nam a2200085Ia 4500
008 130123s9999 xx 000 0 und d
082 _a581.5
245 _aIndian Journal of Ecology. Vol-18 No.1-4
260 _aLudhiana.
_bIndian Ecological Society Punjab Agril. University.
_c1991
999 _c79975
_d79975