RT Journal Article SR Electronic T1 Elm Yellows (= Elm Phloem Necrosis) JF Arboriculture & Urban Forestry (AUF) JO JOA FD International Society of Arboriculture SP 188 OP 188 DO 10.48044/jauf.1987.040 VO 13 IS 7 A1 Holmes, F.W. YR 1987 UL http://auf.isa-arbor.com/content/13/7/188.abstract AB