TY - JOUR T1 - Abstracts JF - Arboriculture & Urban Forestry (AUF) JO - JOA SP - 69 LP - 69 DO - 10.48044/joa.1991.17.3.69 VL - 17 IS - 3 A2 - , Y1 - 1991/03/01 UR - http://auf.isa-arbor.com/content/17/3/69.abstract ER -