Azolla primaeva (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Azolla primaeva" in English language version.

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Little, S. A.; Stockey, R.; Penner, B. (2009). "Anatomy and development of fruits of Lauraceae from the Middle Eocene Princeton Chert". American Journal of Botany. 96 (3): 637–651. doi:10.3732/ajb.0800318. PMID 21628220. S2CID 38272445.
Greenwood, D. R.; et al. (2005). "Fossil biotas from the Okanagan Highlands, southern British Columbia and northeastern Washington State: climates and ecosystems across an Eocene landscape". Canadian Journal of Earth Sciences. 42 (2): 167–185. Bibcode:2005CaJES..42..167G. doi:10.1139/e04-100.

Greenwood, D. R.; et al. (2005). "Fossil biotas from the Okanagan Highlands, southern British Columbia and northeastern Washington State: climates and ecosystems across an Eocene landscape". Canadian Journal of Earth Sciences. 42 (2): 167–185. Bibcode:2005CaJES..42..167G. doi:10.1139/e04-100.

Little, S. A.; Stockey, R.; Penner, B. (2009). "Anatomy and development of fruits of Lauraceae from the Middle Eocene Princeton Chert". American Journal of Botany. 96 (3): 637–651. doi:10.3732/ajb.0800318. PMID 21628220. S2CID 38272445.

Little, S. A.; Stockey, R.; Penner, B. (2009). "Anatomy and development of fruits of Lauraceae from the Middle Eocene Princeton Chert". American Journal of Botany. 96 (3): 637–651. doi:10.3732/ajb.0800318. PMID 21628220. S2CID 38272445.

Arnold, C. A. (1955). "A Tertiary Azolla from British Columbia" (PDF). Contributions from the Museum of Paleontology, University of Michigan. 12 (4): 37–45.