Taxonomy, evolution, and stratigraphic value of Azolla and Azollopsis in the upper Cretaceous and early Tertiary

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1972

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Bibliography: p. 335-340.

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Sweet, A. R. (1972). Taxonomy, evolution, and stratigraphic value of Azolla and Azollopsis in the upper Cretaceous and early Tertiary (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/17744

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http://hdl.handle.net/1880/15032

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