- Author: Karl R. Popper
- Language: Spanish
- Year: 1957
- Author: Karl R. Popper y John Eccles
- Language: Spanish
- Year: 2017
- Author: Zoë A. Popper
- Language: English
- Year: 2020
- Author: POPPER Karl
- Language: Portuguese
- Year: 1980
- Author: Karl R. Popper
- Language: Spanish
- Year: 2016
- Author: Karl R. Popper & Konrad Lorenz
- Language: Spanish
- Year: 1985
- Author: Popper Karl, Camiller Patrick(Translator)
- Language: English
- Year: 2001
- Author: Karl Popper M. A. Notturno (editor)
- Language: English
- Year: 1995
- Author: Popper Karl Raimund
- Language: English
- Year: 2010
