TY - JOUR T1 - Abstract JF - Arboriculture & Urban Forestry (AUF) JO - JOA SP - 215 LP - 215 DO - 10.48044/joa.1990.16.8.215 VL - 16 IS - 8 A2 - , Y1 - 1990/08/01 UR - http://auf.isa-arbor.com/content/16/8/215.abstract N2 - ER -