00357nam a2200109Ia 4500008004100000082002100041100001500062245007200077260004400149650002700193650002700220220204s9999    xx            000 0 und d  a581.1:577bGUP.3  aGupta, U S 0aPhysiology of stressed crops. V. III. The stress of allelochemicals  aNew DelhibOxford & IBH Publisingc2006  aTree crop interference  aWeed crop interference