RYDIN, C., PEDERSEN, K. R., CRANE, P. R., & FRIIS, E. M. (2006). Former Diversity of Ephedra (Gnetales): Evidence from Early Cretaceous Seeds from Portugal and North America. Oxford University Press.
Chicago-tyylinen lähdeviittausRYDIN, CATARINA, KAJ RAUNSGAARD PEDERSEN, PETER R. CRANE, ja ELSE MARIE FRIIS. Former Diversity of Ephedra (Gnetales): Evidence From Early Cretaceous Seeds From Portugal and North America. Oxford University Press, 2006.
MLA-viiteRYDIN, CATARINA, KAJ RAUNSGAARD PEDERSEN, PETER R. CRANE, ja ELSE MARIE FRIIS. Former Diversity of Ephedra (Gnetales): Evidence From Early Cretaceous Seeds From Portugal and North America. Oxford University Press, 2006.
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