00560nam a2200157 a 450000100080000000500110000800800410001910000230006024500860008326000270016930000100019649000200020652000830022665300450030965300480035410041332004-11-16       1990    bl uuuu     u0uu1 u    #d1 aSILVA, C. A. B. da  aExpert systemsbconcepts and relevance for the agricultural economics profession.  aBonn: ILB, 1990.c1990  a24 p.  a(Bericht 90/6).  aBasic concepts. Relevance for agricultural economists and limitations thereof.  aExpert systems in agricultural economics  aSistemas especialistas em economia agricola