Gutberlet, K. (1878). Lehrbuch der Philosophie.
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Tohutoru Kātū Chicago (17th ed.)
Gutberlet, Konstantin. Lehrbuch Der Philosophie. Münster, 1878.
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Tohutoro MLA (9th ed.)
Gutberlet, Konstantin. Lehrbuch Der Philosophie. 1878.
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