Pinus ponderosa
Subtitle: a taxonomic review with five subspecies in the United States
By: Robert Z. Callaham
Contributors: Pacific Southwest Research Station
Series: Research paper PSW -- RP-264
Publisher: United States Department of Agriculture, Forest Service, Pacific Southwest Research Station
Published: 2013
Place of publication: Albany, CA]
Language: eng
Number of pages: 52
Subjects: Ponderosa pine; Classification; Identification
Notes: Title from title screen (viewed on October 30, 2013).

"September 2013."

Includes bibliographical references.