00413naa a2200157 a 450000100080000000500110000800800410001910000170006024500470007726000060012465300230013065300150015365300110016865300200017977300560019911045022007-05-03               bl ---       0--  u    #d1 aHASSEL, M.P.  aEquilibrium levels and biological control.  c0  aCONTROLE BIOLOGICO  aEQUILIBRIO  aNIVEIS  aPRAGA DE PLANTA  tJ. Ent. Soc. Sth. Afr.gv.39, n.2, p.357-366, 1976.