- Author: Dmitrij Čiževskij
- Language: German
- Year: 1956
- Author: Roy G. Jones
- Language: English
- Year: 1972
- Author: Trevor G. Fennell, Henry Gelsen
- Language: English
- Year: 1980
- Author: Janís Endzelíns, William R. Schmalstieg, Benjamin Jégers
- Language: English
- Year: 1971
- Author: Eva Kagan-Kans
- Language: English
- Year: 1979
- Author: Edward Stankiewicz, Dean S. Worth
- Language: English
- Year: 1970
- Author: Jacques Veyrenc
- Language: French
- Year: 1968
- Author: Michael S. Flier
- Language: English
- Year: 1974
- Author: Leonard J. Kent
- Language: English
- Year: 1969
