TY - JOUR T1 - Innovations in the Tree Care Industry JF - Arboriculture & Urban Forestry (AUF) SP - 326 LP - 328 DO - 10.48044/jauf.1981.075 VL - 7 IS - 12 AU - W.M. Black Y1 - 1981/12/01 UR - http://auf.isa-arbor.com/content/7/12/326.abstract ER -