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- Atmospheric deposition -- California -- Stanislaus National Forest Region1
- Atmospheric deposition -- California -- Yosemite National Park Region1
- Epiphytic lichens -- Effect of air pollution on -- California -- Stanislaus National Forest Region1
- Epiphytic lichens -- Effect of air pollution on -- California -- Yosemite National Park Region1
- Lichen communities -- California -- Stanislaus National Forest Region1
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