PT - JOURNAL ARTICLE ED - , TI - Abstract AID - 10.48044/joa.1980.6.1.15 DP - 1980 Jan 01 TA - Arboriculture & Urban Forestry (AUF) PG - 15--15 VI - 6 IP - 1 4099 - http://auf.isa-arbor.com/content/6/1/15.short 4100 - http://auf.isa-arbor.com/content/6/1/15.full SO - JOA1980 Jan 01; 6