RT Journal Article SR Electronic T1 Oak Pathology—using Leaf Symptoms to Diagnose Recondite Maladies JF Arboriculture & Urban Forestry (AUF) JO JOA FD International Society of Arboriculture SP 228 OP 233 DO 10.48044/jauf.1978.057 VO 4 IS 10 A1 Eugene P. Van Arsdel YR 1978 UL http://auf.isa-arbor.com/content/4/10/228.abstract AB