TY - JOUR T1 - Abstract JF - Arboriculture & Urban Forestry (AUF) SP - 187 LP - 187 DO - 10.48044/joa.1981.7.7.187 VL - 7 IS - 7 A2 - , Y1 - 1981/07/01 UR - http://auf.isa-arbor.com/content/7/7/187.abstract N2 - ER -