RT Journal Article SR Electronic T1 Togetherness JF Arboriculture & Urban Forestry (AUF) JO JOA FD International Society of Arboriculture SP 158 OP 158 DO 10.48044/jauf.1975.037 VO 1 IS 8 A1 Mary G. Van Wormer YR 1975 UL http://auf.isa-arbor.com/content/1/8/158.abstract