TY - JOUR T1 - Abstract JF - Arboriculture & Urban Forestry (AUF) JO - JOA SP - 163 LP - 163 DO - 10.48044/joa.1987.13.6.163 VL - 13 IS - 6 A2 - , Y1 - 1987/06/01 UR - http://auf.isa-arbor.com/content/13/6/163.abstract N2 - ER -