TY - JOUR T1 - Abstract JF - Arboriculture & Urban Forestry (AUF) JO - JOA SP - 77 LP - 77 DO - 10.48044/joa.1975.1.4.77 VL - 1 IS - 4 A2 - , Y1 - 1975/04/01 UR - http://auf.isa-arbor.com/content/1/4/77.abstract ER -