- Author: Friedrich Naumann
- Language: German
- Year: 2007
- Author: Harold G. Merriam
- Language: English
- Year: 2019
- Author: Theodore V. Purcell
- Language: English
- Year: 1960
- Author: Oswald Spengler (editor), Anke Birkenmaier (editor)
- Language: Spanish, Castilian
- Year: 2020
Proto-Wintun
pdf
- Author: Alice Shepherd
- Language: English
- Year: 2006
- Author: Astrid Köhler
- Language: German
- Year: 2018
