00400nam a2200133Ia 4500008004100000082003100041100002000072245003000092260005200122300001000174600002500184600002500209650003200234140113s9999    xx            000 0 und d  a631.461'67.2:581.43:632 L9  a"Krupa, S. V. "  aecology of root pathogens  b"Amsterdam : Elsevier publishing company, 1979"  a281p.  a" Dommergues, Y. R."  a" Dommergues, Y. R."  aSoil microorganisms-ecology