DeKalb, Victor ; Phillips, Ross ; Biller, Cleveland . 1971. Engineering Field Notes: Volume 3 Number 9 September 1971. 7171 3809. Washington DC: U.S. Department of Agriculture, Forest Service, Engineering. 10 p.

Topics in this issue include:

• Transportation System Analysis and Resource Planning
• A Meter/Recorder to Measure logging Road Roughness

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