00247nam a22000977a 4500003000400000008004100004082001800045100001800063245003300081260003500114OSt230915b        |||||||| |||| 00| 0 eng d  a632.954bA81M  aAshton, F. M.  aMode of action of Herbicides  aNew YorkbWiley Int. Sc.c1973