Chatterjee 2002. The morphology and systematics of Polarornis, a Cretaceous loon (Aves: Gaviidae) from Antarctica. Proceedings of the 5th Symposium of the Society of Avian Paleontology and Evolution, Beijing, 1-4 June 2000., Science Press, Beijing, 2002: i-ii, i-viii, 1-311. Chapter pagination: 125-155