TY - JOUR T1 - A Half Century with Trees and their Friends JF - Arboriculture & Urban Forestry (AUF) JO - JOA SP - 131 LP - 136 DO - 10.48044/jauf.1975.030 VL - 1 IS - 7 AU - Paul E. Tilford Y1 - 1975/07/01 UR - http://auf.isa-arbor.com/content/1/7/131.abstract N2 - ER -