TY - JOUR T1 - Abstract JF - Arboriculture & Urban Forestry (AUF) JO - JOA SP - 209 LP - 209 DO - 10.48044/joa.1979.5.9.209 VL - 5 IS - 9 A2 - , Y1 - 1979/09/01 UR - http://auf.isa-arbor.com/content/5/9/209.abstract N2 - ER -