TY - JOUR T1 - Abstract JF - Arboriculture & Urban Forestry (AUF) JO - JOA SP - 97 LP - 97 DO - 10.48044/joa.1987.13.4.97 VL - 13 IS - 4 A2 - , Y1 - 1987/04/01 UR - http://auf.isa-arbor.com/content/13/4/97.abstract ER -