PT - JOURNAL ARTICLE ED - , TI - Abstract AID - 10.48044/joa.1975.1.3.57 DP - 1975 Mar 01 TA - Arboriculture & Urban Forestry (AUF) PG - 57--57 VI - 1 IP - 3 4099 - http://auf.isa-arbor.com/content/1/3/57.short 4100 - http://auf.isa-arbor.com/content/1/3/57.full SO - JOA1975 Mar 01; 1