PT - JOURNAL ARTICLE ED - , TI - Abstract AID - 10.48044/joa.1982.8.2.52 DP - 1982 Feb 01 TA - Arboriculture & Urban Forestry (AUF) PG - 52--52 VI - 8 IP - 2 4099 - http://auf.isa-arbor.com/content/8/2/52.short 4100 - http://auf.isa-arbor.com/content/8/2/52.full