
- Author: fl. ca. 1196 Ambroise
- Language: English
- Year: 1976

- Author: von Bremen Adam Francis Joseph Tschan
- Language: English
- Year: 1959

- Author: Harry August Rositzke
- Language: English
- Year: 1951

- Author: James F. Kenney
- Language: English
- Year: 1966

- Author: Pope Sylvester II Harriet Pratt Lattin
- Language: English
- Year: 1961

- Author: William Harris. Stahl Richard Johnson E. L. Burge
- Language: English
- Year: 1971

- Author: George Vernadsky
- Language: English
- Year: 1979