TY - JOUR T1 - Abstract JF - Arboriculture & Urban Forestry (AUF) JO - JOA SP - 55 LP - 55 DO - 10.48044/joa.1987.13.2.55 VL - 13 IS - 2 A2 - , Y1 - 1987/02/01 UR - http://auf.isa-arbor.com/content/13/2/55.abstract N2 - ER -