Protagoras
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- Author: Plato Martin Ostwald Gregory Vlastos
- Language: English
- Year: 1956
- Author: Sacheverell Sitwell
- Language: English
- Year: 1953
- Author: John Howard Jackson
- Language: English
- Year: 1969
- Author: Lewis White Beck
- Language: English
- Year: 1965
- Author: Leroy N. Rieselbach
- Language: English
- Year: 1966
- Author: George Agnew Chamberlain
- Language: English
- Year: 1920
- Author: John H. Bracey Jr., August Meier, Elliott Rudwick (ed.)
- Language: English
- Year: 1970
- Author: Howard Waitzkin Barbara Waterman
- Language: English
- Year: 1974
- Author: Gregory the Great Gregorius I Myra L. Uhlfelder (transl.)
- Language: English
- Year: 1967
- Author: Robert Goldston
- Language: English
- Year: 1972