Factors affecting the productivity of logging crews using chain saws and wheeled skidders in tree-length aspen
By: [Dennis P. Bradley, Frank E. Biltonen].
Contributors: Biltonen, Frank E.; North Central Forest Experiment Station (Saint Paul, Minn.)
Series: Research note NC -- 151.
Publisher: North Central Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture
Published: 1973
Place of publication: St. Paul, Minn
Language: eng
Subjects: Logging -- Minnesota; Forests and forestry -- Economic aspects; Forestry efficiency
Notes: Caption title.

Includes bibliographical references (p. 4).