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| Boreal mixedwood forest (1) |
| Budworm / forest interrelations (1) |
| Effect of spruce budworm on forest regeneration (1) |
| Spruce budworm (Ontario Black Sturgeon Lake Region) (1) |
| Boreal mixedwood forest (1) |
| Budworm / forest interrelations (1) |
| Effect of spruce budworm on forest regeneration (1) |
| Spruce budworm (Ontario Black Sturgeon Lake Region) (1) |