TY - JOUR T1 - Aerial Rescue JF - Arboriculture & Urban Forestry (AUF) SP - 197 LP - 203 DO - 10.48044/jauf.1981.049 VL - 7 IS - 8 AU - Richard G. Alvarez Y1 - 1981/08/01 UR - http://auf.isa-arbor.com/content/7/8/197.abstract N2 - ER -