TY - JOUR T1 - Abstracts JF - Arboriculture & Urban Forestry (AUF) JO - JOA SP - 50 LP - 50 DO - 10.48044/joa.1989.15.2.50 VL - 15 IS - 2 A2 - , Y1 - 1989/02/01 UR - http://auf.isa-arbor.com/content/15/2/50.abstract N2 - ER -