Piper, C. V., & Beattie, R. K. (1901). The flora of the Palouse region: Containing descriptions of all the spermatophytes and pteridophytes known to grow wild in the area within 35 kilometers of Pullman, Washington. The Washington Agricultural College and School of Science.
Cita Chicago Style (17a ed.)Piper, Charles V., y R. Kent Beattie. The Flora of the Palouse Region: Containing Descriptions of All the Spermatophytes and Pteridophytes Known to Grow Wild in the Area Within 35 Kilometers of Pullman, Washington. Pullman: The Washington Agricultural College and School of Science, 1901.
Cita MLA (8a ed.)Piper, Charles V., y R. Kent Beattie. The Flora of the Palouse Region: Containing Descriptions of All the Spermatophytes and Pteridophytes Known to Grow Wild in the Area Within 35 Kilometers of Pullman, Washington. The Washington Agricultural College and School of Science, 1901.