- Author: Richard Graham Thomas E. Skidmore Aline Helg Alan Knight
- Language: English
- Year: 1990
- Author: Richard Walter Thomas
- Language: English
- Year: 1992
- Author: Roger East, Richard J. Thomas, 1st Ed Eur, Richard Thomas
- Language: English
- Year: 2003
- Author: Marsilio Ficino, Elisabeth Blum, Paul Richard Blum, Thomas Leinkauf, Elisabeth Blum, Paul Richard Blum, Thomas Leinkauf
- Language: German
- Year: 1995
- Author: Richard F. Thomas (editor)
- Language: English
- Year: 2011
- Author: Richard W. Thomas, Frederick Landry
- Language: English
- Year: 2022
- Author: Richard K. Thomas
- Language: English
- Year: 2022
- Author: Richard Gough Thomas
- Language: English
- Year: 2019
- Author: Richard H. Thomas
- Language: English
- Year: 2021
- Author: Richard Graham, Thomas E. Skidmore, Aline Helg, Alan Knight
- Language: English
- Year: 1992