Search Results for the EPA National Library Catalog

Items Found: 3
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Your Search: (SUBJECT=Spirodela)

Select Item Title Year Published
Environmental Control of Nitrogen Fixation in Lakes: I. In situ Nitrogen Fixation by Free Living Blue-Green Algae. II. Nitrogen Fixation by the Duck-Weed-Algal Association. 1974
Factors affecting the uptake of iron in Spirodela oligorhiza (Kurtz) Hegelm / 1961
Water quality renovation of animal waste lagoons utilizing aquatic plants / 1978

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