TY - JOUR T1 - Abstract JF - Arboriculture & Urban Forestry (AUF) JO - JOA SP - 136 LP - 136 DO - 10.48044/joa.1975.1.7.136 VL - 1 IS - 7 A2 - , Y1 - 1975/07/01 UR - http://auf.isa-arbor.com/content/1/7/136.abstract N2 - ER -