Rocky Mountain mine timbers
By: by Norman De W. Betts.
Series: Bulletin of the U.S. Department of Agriculture -- no. 77.
Publisher: U.S. Dept. of Agriculture
Published: 1914
Place of publication: Washington, D.C
Language: eng
Number of pages: 34
Subjects: Mine timbering -- Rocky Mountains.; Timber -- Rocky Mountains -- Evaluation.
Notes: Caption title.

"May 7, 1914."

"Professional paper."

Also issued online.