TY - JOUR T1 - Abstract JF - Arboriculture & Urban Forestry (AUF) SP - 216 LP - 216 DO - 10.48044/joa.1991.17.8.216 VL - 17 IS - 8 A2 - , Y1 - 1991/08/01 UR - http://auf.isa-arbor.com/content/17/8/216.abstract N2 - ER -