way to reduce highway guardrail costs: machine-driving of wooden posts.
Series: United States. Northeastern Forest Experiment Station (Upper Darby, Pa.). U.S. Forest Service research paper NE- -- 81.; Research paper NE -- 81.
Publisher: U.S. Forest Service
Published: 1967
Place of publication: Upper Darby, Pa
Language: eng
Number of pages: 19
Subjects: Roads -- Guard fences -- Costs; Wood poles
Notes: Cover title.

Literature cited: p. 19.