%0 Journal Article %A Henry Gilbertson %A Dennis Chef %A Balakrishna Rao %T Davey Horticultural Institute Research %D 1979 %R 10.48044/jauf.1979.025 %J Arboriculture & Urban Forestry (AUF) %P 106-109 %V 5 %N 5 %U https://auf.isa-arbor.com/content/isa/5/5/106.full.pdf