Dyrness, C.T.; Youngberg, C.T. 1966. Soil-vegetation relationships within the ponderosa pine type in the central Oregon pumice region. Ecology. 47(1): 122-138.

Dyrness, C.T.; Youngberg, C.T. 1966. Soil-vegetation relationships within the ponderosa pine type in the central Oregon pumice region. Ecology. 47(1): 122-138.

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