Canadian Forest Service Publications
Defoliation by spruce budworm: estimation by ocular and shoot-count methods and variability among branches, trees, and stands. 1982. MacLean, D.A.; Lidstone, R.G. Canadian Journal of Forest Research 12: 582-594.
Available from: Atlantic Forestry Centre
Catalog ID: 7210
CFS Availability: Order paper copy (free)
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