A guide to the use of visual aids /

by Powell, L. S.
Published 1968

Falling decadent cedar-hemlock stands : a comparison of tree breakage and wood recovery in summer vs. winter operations /

by Powell, L. H.
Published 1977

Evaluation of Bombardier B-15 choker arch skidder and comparison with EMC 210CA skidder /

by McDonald, M. J.
Published 1978