TY - JOUR T1 - Urban Tree Diseases and the Need for Arboricultural Medicine JF - Arboriculture & Urban Forestry (AUF) JO - JOA SP - 198 LP - 201 DO - 10.48044/jauf.1978.050 VL - 4 IS - 9 AU - Erik Jorgensen Y1 - 1978/09/01 UR - http://auf.isa-arbor.com/content/4/9/198.abstract N2 - ER -