TY - JOUR T1 - Abstract JF - Arboriculture & Urban Forestry (AUF) JO - JOA SP - 77 LP - 77 DO - 10.48044/joa.1987.13.3.77 VL - 13 IS - 3 A2 - , Y1 - 1987/03/01 UR - http://auf.isa-arbor.com/content/13/3/77.abstract N2 - ER -