Turesson, G. 1914. Slope exposure as a factor in the distribution of Pseudotsuga taxifolia in arid parts of Washington. Bulletin of the Torrey Botanical Club. 41(6): 337-345.

Turesson, G. 1914. Slope exposure as a factor in the distribution of Pseudotsuga taxifolia in arid parts of Washington. Bulletin of the Torrey Botanical Club. 41(6): 337-345.