Helicopter logging
Subtitle: a model for locating landings
By: Louis T. Egging and David F. Gibson.
Contributors: Gibson, David F. 1942-
Series: USDA Forest Service research paper INT -- 155.
Publisher: Intermountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture
Published: 1974
Place of publication: Ogden, Utah
Language: eng
Number of pages: 27
Subjects: Logging, Aerial -- Computer programs.
Notes: Bibliography: p. 27.