00488nam a2200169 a 450000100080000000500110000800800410001910000170006024500920007726000600016930000110022950000170024065000240025765000160028165000120029765300090030918414311995-12-18       1969    bl uuuu  m   00u1 u    #d1 aSMITH, J. G.  aEffects of crop background on populations of Brassica aphids and their natural enemies.  aAscot: Imperial College of Science and Technologyc1969  a259 p.  aPhD. Thesis.  aControle Biológico  aEntomologia  aPulgão  aTese