Dirr's Encyclopedia of Trees and Shrubs

The reference manual of woody plant propagation

Dirr's Trees and Shrubs for Warm Climates

Tree Book

Reference Manual of Woody Plant Propagation

Hydrangeas for American Gardens

Photographic Manual of Woody Landscape Plants

Manual of woody landscape plants

Michael A. Dirr Photo-Library of Woody Landscape Plants on CD-Rom

Creative Home Landscaping

Manual of Woody Landscape Plants (Their Identification, Ornamental Characters, Culture, Propagation and Uses)