RT Journal Article SR Electronic T1 Keeping America Natural JF Arboriculture & Urban Forestry (AUF) JO JOA FD International Society of Arboriculture SP 96 OP 97 DO 10.48044/jauf.1976.023 VO 2 IS 5 A1 Montgomery, Charles R. YR 1976 UL http://auf.isa-arbor.com/content/2/5/96.abstract AB