000 002780000a22001090004500
100 1 _aHart, William
245 1 0 _aUsing agricultural chemicals safely
300 _aNúm 2 (1990), Páginas 6-7
700 1 _aCarter, Isabel (Gordon) (1897- )
773 0 _tPaso a paso
942 _cANA
999 _c52031
_d52031