Ayer, Alfred Jules, 1910-1989
The central questions of philosophy
Penguin Books, 1982
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Russell, Bertrand, 1872-1970
The problems of philosophy
Oxford University Press, 1912
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Bentley, John Edward
Philosophy an outline-history: with questions and answers
Littlefield, Adams, 1958
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Man and philosophy: German opinion on problems of today
editor, Walter Leifer
Max Hueber verlag, Muchen, 1964
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Stumpf, Samuel Enoch, 1918-1998
Philosophical problems: selected readings in ethics, religion, political philosophy, epistemology, and metaphysics
McGraw-Hill, 1971
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