Template:Radtke, Pigg & Wehr, 2005
- Radtke, M.G., Pigg, K.B. & Wehr, W.C. 2005. Fossil Corylopsis and Fothergilla leaves (Hamamelidaceae) from the Lower Eocene flora of Republic, Washington, U.S.A., and their evolutionary and biogeographic significance. International Journal of Plant Sciences 166(2): 347–356. DOI: 10.1086/427483
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