TY - JOUR T1 - Abstract JF - Arboriculture & Urban Forestry (AUF) JO - JOA SP - 57 LP - 57 DO - 10.48044/joa.1975.1.3.57 VL - 1 IS - 3 A2 - , Y1 - 1975/03/01 UR - http://auf.isa-arbor.com/content/1/3/57.abstract ER -