TY - JOUR T1 - Abstract JF - Arboriculture & Urban Forestry (AUF) SP - 39 LP - 39 DO - 10.48044/joa.1982.8.2.39 VL - 8 IS - 2 A2 - , Y1 - 1982/02/01 UR - http://auf.isa-arbor.com/content/8/2/39.abstract ER -