An index of ripeness for sugar pine seed
By: by H. A. Fowells
Contributors: California Forest and Range Experiment Station
Series: Research note / California Forest and Range Experiment Station -- no. 64; Research note (California Forest and Range Experiment Station) -- no. 64.
Publisher: California Forest and Range Experiment Station
Published: 1949
Place of publication: Berkeley, Calif
Language: eng
Subjects: Germination; Sugar pine
Notes: "November 1949"

Includes bibliographic references (p. 5).