PT - JOURNAL ARTICLE ED - , TI - Abstract AID - 10.48044/joa.1982.8.1.6 DP - 1982 Jan 01 TA - Arboriculture & Urban Forestry (AUF) PG - 6--6 VI - 8 IP - 1 4099 - http://auf.isa-arbor.com/content/8/1/6.short 4100 - http://auf.isa-arbor.com/content/8/1/6.full