Twenty-year results of the Lake States jack pine seed source study
By: Richard M. Jeffers, Raymond A. Jensen.
Contributors: Jensen, Raymond A.; United States. Forest Service.; North Central Forest Experiment Station (Saint Paul, Minn.)
Series: USDA Forest Service research paper NC ; 181; USDA Forest Service research paper NC -- 181.
Publisher: Dept. of Agriculture, Forest Service, North Central Forest Experiment Station
Published: 1980
Place of publication: St. Paul, Minn
Language: eng
Number of pages: 20
Subjects: Jack pine.; Seeds -- Michigan -- Testing.; Seeds -- Minnesota -- Testing.; Seeds -- Wisconsin -- Testing.
Notes: Bibliography: p. 19-20.

Also issued online.