| Avaa | Koelz, Walter
| The Coregonid Fishes of North-Eastern America | | kirja | kala - kalat, kalalajit, Pohjois-Amerikka | Michigan Academy of Science, Arts and Letters | Michigan | 1931 | 130 | | Michigan Academy of Science, Arts and Letters, Vol XIII, pages 303-432 | | I-Tutkimus |