00453nam a2200157 a 450000100080000000500110000800800410001910000200006024500870008026000590016730000100022665000170023665000150025365300140026865300130028212980692006-10-31       1983    bl uuuu     u01u1 u    #d1 aWILLIAMS, R. D.  aCommunication of weed science technologies in developing countriesbproceedings...  aCorvallis: International Plant Protection Centerc1983  a214p.  aErva Daninha  aTecnologia  aCongresso  aControle