00523    a2200121   4500020001500000082001300015245021300028260005900241300002300300440002400323650003900347650001500386  a9201045964  a630bENV  aEnvironmental behaviour  of crop protection chemicals bProceedings of an international symposium on the use of nuclear and related techniques for studying environmental behaviour of crop protection chemicals  aViennabInternational Atomic Energy Agencyc1997g1997  a[viii],519p.c24cm  aProceedings series   aAgriculture and related technology  aTechnology