TY - JOUR T1 - Abstract JF - Arboriculture & Urban Forestry (AUF) JO - JOA SP - 181 LP - 181 DO - 10.48044/joa.1990.16.7.181 VL - 16 IS - 7 A2 - , Y1 - 1990/07/01 UR - http://auf.isa-arbor.com/content/16/7/181.abstract N2 - ER -