00495nam a2200181Ia 4500008004100000020001600041082001800057100002100075245003300096250000600129260004000135300000800175650004100183650003400224653001500258653001900273700002100292170901s1981    xx            000 0 und d  a047104847 X  a632.954bA81M  aAshton, Floyd M. 0aMode of Action of Herbicides  a2  aNew YorkbJohn Wiley and Sonsc1981  a525  aAgriculture and related technologies  aTechnology (Applied sciences)  aHerbicides  aMode of action  aCrafts, Alden S.