- Author: Peter Gorman
- Language: English
- Year: 1979
- Author: Peter Gorman
- Language: English
- Year: 1979
- Author: Karl Raimund Popper
- Language: English
- Year: 1963
- Author: Weinberg E.A.
- Language: English
- Year: 1974
- Author: Catherine Sanders, Chris Stewart, Rhonda Evans
- Language: English
- Year: 1987
- Author: Marjorie Boulton
- Language: English
- Year: 1980
- Author: Richard Higgott
- Language: English
- Year: 1985
- Author: Chantal Mouffe
- Language: English
- Year: 1979
- Author: Charles-André Julien, John Petrie, Charles Cameron Stewart, Roger Le Tourneau
- Language: English
- Year: 1970