TY - JOUR T1 - Tree Quality JF - Arboriculture & Urban Forestry (AUF) SP - 316 LP - 318 DO - 10.48044/jauf.1990.068 VL - 16 IS - 12 AU - Klaus Vollbrecht Y1 - 1990/12/01 UR - http://auf.isa-arbor.com/content/16/12/316.abstract N2 - ER -