MTDC Staff, . 1981. Engineering Field Notes: Volume 13 Number 7 September—October 1981. 8171 3807. Missoula, MT: U.S. Department of Agriculture, Forest Service, Missoula Technology and Development Center. 40 p.

Topics in this issue include:

• Another Patent Awarded to Forest Service Engineers
• Vertical Spar Guying: A Brief Examination of Forces

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