000 00278nam a2200121Ia 4500
008 180721s9999 xx 000 0 und d
100 _aO.P. GUPTA
245 0 _aWEED MANGEMENT : PRINCIPLES AND PRACTICES
260 _bNil
260 _c1997
365 _b400.00
942 _cBK
999 _c162683
_d162683