ACKNOWLEDGMENT 
The authors owe a special debt of gratitude to Dr. Nicholas T. Mirov, 
who began this project before his retirement from the U.S. Forest Service 
in 1961. His many specific contributions, particularly to the information 
about the eastern and southeastern Asian species, are acknowledged in the 
text. Dr. Robert Z. Callaham has been helpful and encouraging through- 
out the preparation of this publication. Many persons have provided 
valuable information about pine distribution, and their contributions are 
acknowledged in the text under the appropriate species. 
For their work in compiling and drafting the maps, the authors 
are greatly indebted to Audrey E. Kursinski and Barry K. Ford. 
Il 
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