13 books
Another Scale Insect on Beech (Classic Reprint)
Tree Defects
Compartmentalization of Decay in Trees (Classic Reprint)
A Tree Hurts, Too (Classic Reprint)
A Tree Hurts, Too (Large Text Classic Reprint)
Tree Anatomy
Tree Basics
Five Minute Tree Care
Modern Arboriculture
A New Tree Biology
Tree Pruning: a Worldwide Photo Guide
A New Tree Biology Dictionary
New Tree Biology: with Dictionary