Overcoming temperature-dependent dormancy of southwestern ponderosa pine seed
By: L.J. Heidmann.
Contributors: Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.)
Series: Research note RM -- 406.
Publisher: USDA Forest Service, Rocky Mountain Forest and Range Experiment Station
Published: 1981
Place of publication: [Fort Collins. Colo.]
Language: eng
Subjects: Ponderosa pine; Pine -- Seeds -- Southwestern States
Notes: Cover title.

"June 1981."

Bibliography: p. 3-4.