TY - JOUR T1 - Abstracts JF - Arboriculture & Urban Forestry (AUF) SP - 93 LP - 93 DO - 10.48044/joa.1991.17.4.93 VL - 17 IS - 4 A2 - , Y1 - 1991/04/01 UR - http://auf.isa-arbor.com/content/17/4/93.abstract N2 - ER -