00491naa a2200181 a 450000100080000000500110000800800410001910000200006024500700008026000090015065000120015965000170017165300250018865300170021365300120023070000160024277300510025818315812010-01-10       1956    bl ---       0--  u    #d1 aSHADBOLT, C. A.  aSome quantitative aspects of weed competition in vegetable crops.  c1956  aDoença  aErva Daninha  aAspecto quantitativo  aComposição  aCultura1 aHOLM, L. G.  tWeeds, New Yorkgv. 4, n. 2, p. 111-123, 1956.