TY - JOUR T1 - Importance of Supervisionutility Responsibility JF - Arboriculture & Urban Forestry (AUF) SP - 137 LP - 138 DO - 10.48044/jauf.1981.032 VL - 7 IS - 5 AU - William B. Hamilton Y1 - 1981/05/01 UR - http://auf.isa-arbor.com/content/7/5/137.abstract N2 - ER -