Discovery of a Cretaceous Bird, Apparently Ancestral to the Orders Coraciiformes and Piciformes (Aves: Carinatae)DOI: info:10.5479/si.00810266.27.67Smithsonian Institution Press67–73
Brodkorb, Pierce. 1976. "Discovery of a Cretaceous Bird, Apparently Ancestral to the Orders Coraciiformes and Piciformes (Aves: Carinatae)." In Collected papers in avian paleontology honoring the 90th birthday of Alexander Wetmore. 67–73. Washington, D.C.: Smithsonian Institution Press. In Smithsonian Contributions to Paleobiology, 27. https://doi.org/10.5479/si.00810266.27.67.