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Ontario hardwood decline survey, 1989 and 1990 — Illustration, Page 35
Effect of acid precipitation on↗
Ontario hardwood decline survey, 1989 and 1990 — Illustration, Page 36
Effect of acid precipitation on↗
Ontario hardwood decline survey, 1989 and 1990 — Illustration, Page 37
Effect of acid precipitation on↗
Ontario hardwood decline survey, 1989 and 1990 — Illustration, Page 46
Effect of acid precipitation on↗