%0 Journal Article %A Bruce R. Roberts %T Trees As Biological Filters %D 1980 %R 10.48044/jauf.1980.006 %J Arboriculture & Urban Forestry (AUF) %P 20-23 %V 6 %N 1 %U https://auf.isa-arbor.com/content/isa/6/1/20.full.pdf