TY - JOUR T1 - Abstract JF - Arboriculture & Urban Forestry (AUF) JO - JOA SP - 60 LP - 60 DO - 10.48044/joa.1988.14.3.60 VL - 14 IS - 3 A2 - , Y1 - 1988/03/01 UR - http://auf.isa-arbor.com/content/14/3/60.abstract N2 - ER -