Production rates and costs for cable, balloon, and helicopter yarding systems in old-growth Douglas-fir
By: Dennis P. Dykstra.
Contributors: Oregon State University. Forest Research Laboratory.
Series: Research bulletin - Oregon State University. Forest Research Laboratory ; 18; Research bulletin (Oregon State University. Forest Research Laboratory) -- 18.
Publisher: Forest Research Laboratory, Oregon State University
Published: 1975
Place of publication: Corvallis
Language: eng
Number of pages: 57
Subjects: Logging -- Economic aspects.
Notes: Bibliography: p. 43-45.