TY - JOUR T1 - Our Part in the Environmental Movement JF - Arboriculture & Urban Forestry (AUF) SP - 1 LP - 7 DO - 10.48044/jauf.1991.001 VL - 17 IS - 1 AU - Herb Pirk Y1 - 1991/01/01 UR - http://auf.isa-arbor.com/content/17/1/1.abstract ER -