
- Author: Karl Popper
- Language: English
- Year: 1995

- Author: Karl Popper
- Language: English
- Year: 1947

- Author: Karl Popper
- Language: Spanish
- Year: 1991

A Pocket Popper
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- Author: Karl Popper David Miller
- Language: English
- Year: 1987

- Author: Karl Popper
- Language: English

- Author: Karl Popper
- Language: English
- Year: 1992

- Author: Karl Popper
- Language: English
- Year: 2002

- Author: Karl Popper
- Language: English
- Year: 2002

- Author: Karl Popper
- Language: English
- Year: 2002