TY - JOUR T1 - Work Measurement System JF - Arboriculture & Urban Forestry (AUF) JO - JOA SP - 43 LP - 44 DO - 10.48044/jauf.1992.010 VL - 18 IS - 1 AU - Edward L. Cunningham Y1 - 1992/01/01 UR - http://auf.isa-arbor.com/content/18/1/43.abstract N2 - ER -