00507nam a2200193 a 450000100080000000500110000800800410001902000180006010000160007824500280009426000390012230000110016149000380017265300240021065300320023465300120026670000160027870000190029410318882022-01-07       1987    bl uuuu     u00u1 u    #d  a0-12-068278-81 aAULD, B. A.  aWeed control economics.  aLondon, (UK): Academic Pressc1987  a176 p.  a(Applied Botany and Crop Science)  aASPECTOS ECONOMICOS  aCONTROL DE MALEZAS Y PLAGAS  aMALEZAS1 aMENZ, K. M.1 aTISDELL, C. A.