Bentley, John Edward, author
Philosophy an outline-history: with questions and answers
Littlefield, Adams, 1958
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Ayer, A. J. (Alfred Jules), 1910-1989, author
The central questions of philosophy
Penguin Books, 1982
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Rader, Melvin
The enduring questions; main problems of philosophy / Melvin Rader.
Holt, Rinehart and Winston, 1966
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Mulvaney, Robert J., author
Classic philosophical questions
Essex Pearson, 2014
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Classic philosophical questions
editor, James A. Gould
Charles E. Merrill , 1971
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