Shigo, Alex L. Tree pruning: a worldwide photo guide - Shigo and Trees, 1989 The aim of this guide is to present results of scientific research on pruning in a way that can be understood easily by all people who care about trees. ISBN: 0943563089 Subjects--Topical Terms: PruningOrnamental trees Subjects--Facted Index Terms: Forestry + woodlands + timber trades + arboriculture Dewey Class. No.: 634.9:27