The shoelace tie-down for flight line markers
By: Richard E. Francis and Roger R. Kerbs.
Contributors: Kerbs, Roger R.; Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.)
Series: Research note RM -- 441.
Publisher: USDA Forest Service, Rocky Mountain Forest and Range Experiment Station
Published: 1984
Place of publication: [Fort Collins, Colo.]
Language: eng
Subjects: Aerial photography.; Phtographic interpretaion.; Aerial photography in forestry.
Notes: "May 1984."

Bibliography: p. 2.