Aquatic plants of the Pacific Northwest
By: with vegetaive keys [by] Albert N. Steward, La Rea J. Dennis [and] Helen M. Gilkey.
Edition: 2d ed.
Series: Oregon State monographs. Studies in botany : -- no. 11
Publisher: Oregon State University Press
Place of publication: Corvallis
Number of pages: 261
Subjects: Fresh-water flora  -- Northwest, Pacific.
Notes: Bibliography: p. 245-246.