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- North Central Forest Experiment Station (Saint Paul, Minn.)13
- United States. Forest Service10
- Canada. Forestry Branch4
- Zavitkovski, J.4
- Jeffers, Richard M.3
- Schoenike, R. E.3
- Adams, W. R. (William Ritchie), 1902-2
- Alban, David H.2
- Benzie, John W.2
- Cayford, J. H.2
- Chrosciewicz, Z.2
- Miller, Elwood L. (Elwood LaVern), 1941-2
- Patton, Christopher, 1969-2
- Roberts, Pamela S.2
- Rudolf, Paul O.2
- Sims, H. P.2
- Strong, Terry F.2
- United States2
- Van Haverbeke, David F., 1928-2
- Young, Cybèle, 1972-2