Production rates and costs for yarding by cable, balloon, and helicopter compared for clearcuttings and partial cuttings
By: Dennis P. Dykstra.
Contributors: Oregon State University. Forest Research Laboratory.
Series: Research bulletin / Oregon State University. Forest Research Laboratory -- 22.; Research bulletin (Oregon State University. Forest Research Laboratory) -- 22.
Publisher: Forest Research Laboratory, School of Forestry, Oregon State University
Published: 1976
Place of publication: Corvallis
Language: eng
Number of pages: 44
Subjects: Douglas fir.; Logging, Aerial -- Costs.
Notes: "May 1976."

Bibliography: p. 39-40.