A provisional tree seed-zone and cone-crop rating system for Arizona and New Mexico
By: by Gilbert H. Schubert and John A. Pitcher.
Contributors: Pitcher, John A.
Series: Research paper RM -- 105.; Research paper RM -- 105.
Publisher: Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture
Published: 1973
Place of publication: Fort Collins, Colo
Language: eng
Subjects: Conifers -- Arizona -- Seeds; Conifers -- New Mexico -- Seeds; Conifers -- Arizona; Conifers -- New Mexico
Other titles: Provisional tree seed zone and cone crop rating system for Arizona and New Mexico.
Notes: Cover title.

Includes bibliographical references (p. 8).