00447naa a2200169 a 450000100080000000500110000800800410001910000140006024500730007426000090014765300130015665300190016970000150018870000150020370000140021877300450023210945971997-12-16       1978    bl ---       0--  u    #d1 aYOUNG, D.  aSelecting appropriate weed control systems for developing countries.  c1978  aCONTROLE  aPLANTA DANINHA1 aMILLER, S.1 aFISHER, H.1 aSHENK, M.  tWeed Sciencegv.26, n.3, p.209-212, May.