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Aquatic Plants of the Pacific Northwest. With vegetative keys. Albert N. Steward, La Rea J. Dennis, and Helen M. Gilkey. Oregon State University Press, Corvallis, ed. 2, 1963. x + 261 pp. Illus. $4.50

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Science  15 Nov 1963:
Vol. 142, Issue 3594, pp. 946
DOI: 10.1126/science.142.3594.946
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