PT  - JOURNAL ARTICLE
AU  - Klaus Vollbrecht
TI  - Tree Quality
AID  - 10.48044/jauf.1990.068
DP  - 1990 Dec 01
TA  - Arboriculture &amp;amp; Urban Forestry (AUF)
PG  - 316--318
VI  - 16
IP  - 12
4099  - http://auf.isa-arbor.com/content/16/12/316.short
4100  - http://auf.isa-arbor.com/content/16/12/316.full