TY - JOUR T1 - Abstracts JF - Arboriculture & Urban Forestry (AUF) SP - 18 LP - 18 DO - 10.48044/joa.1981.7.1.18 VL - 7 IS - 1 A2 - , Y1 - 1981/01/01 UR - http://auf.isa-arbor.com/content/7/1/18.abstract N2 - ER -