- Author: Russel Viljoen
- Language: English
- Year: 2022
- Author: C. West Churchman, Russel L. Ackoff, E. Leonard Arnoff, J. Pfanzagl
- Language: German
- Year: 1971
- Author: Gerald Graff (Author) Cathy Birkenstein (Author) Russel Durst (Author)
- Language: English
- Year: 2021
- Author: Russel C. Hibbeler
- Language: Portuguese
- Author: Michael Russel August Diezmann (transl.)
- Language: German
- Year: 1836
- Author: Michael Russel August Diezmann (transl.)
- Language: German
- Year: 1836
- Author: Poonam Bala (editor) Russel Viljoen (editor)
- Language: English
- Year: 2023
- Author: Alfred Russel Wallace
- Language: English
- Year: 2016
- Author: Charles Darwin, Alfred Russel Wallace
- Language: Spanish
- Year: 2006