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© 1967 Nature Publishing Group

Altithermal Timberline Advance in Western United States

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Page 1: Altithermal Timberline Advance in Western United States

© 1967 Nature Publishing Group

Page 2: Altithermal Timberline Advance in Western United States

© 1967 Nature Publishing Group

Page 3: Altithermal Timberline Advance in Western United States

© 1967 Nature Publishing Group