Template:Pigg, Manchester & Wehr, 2003
- Pigg, K.B., Manchester, S.R. & Wehr, W.C. 2003. Corylus, Carpinus, and Palaeocarpinus (Betulaceae) from the Middle Eocene Klondike Mountain and Allenby Formations of Northwestern North America. International Journal of Plant Sciences 164(5): 807–822. DOI: 10.1086/376816