- Author: David G Martindale
- Language: English
- Year: 1996
- Author: Lacey Baldwin Smith
- Language: English
- Year: 1976
- Author: C. Warren Hollister
- Language: English
- Year: 1995
- Author: Roland E. Larson Robert P. Hostetler Bruce H. Edwards
- Language: English
- Year: 1990
- Author: George O. Curme
- Language: English
- Year: 1931
- Author: Keith Eubank
- Language: English
- Year: 1975
- Author: Felix Dahn (auth.) Carla Wenckebach (ed.)
- Language: German, English
- Year: 1900
- Author: Aleksandr Ya.Khinchin
- Language: English
- Year: 1965