%0 Journal Article %A R. Hendricksen John %T Illinois Arborist Certification %D 1985 %R 10.48044/jauf.1985.012 %J Arboriculture & Urban Forestry (AUF) %P 48-50 %V 11 %N 2 %U https://auf.isa-arbor.com/content/isa/11/2/48.full.pdf