Setchell, W. A. (1907). Some unreported Alaskan Sphagna: Together with a summary of the cryptogamic work of the University of California Botanical Expedition to Alaska in 1899. Berkeley: The University Press.

Setchell, William Albert. Some Unreported Alaskan Sphagna: Together With a Summary of the Cryptogamic Work of the University of California Botanical Expedition to Alaska in 1899. Berkeley: The University Press, 1907.

Setchell, William Albert. Some Unreported Alaskan Sphagna: Together With a Summary of the Cryptogamic Work of the University of California Botanical Expedition to Alaska in 1899. Berkeley: The University Press, 1907.