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【4周达】A Validation of Knowledge: A New, Objective Theory of Axioms, Causality, Meaning, Propositio... [9780999704165]
【4周达】Pronuntiatus - Propositio [9783598770500]
【4周达】Propositio - Protego [9783598770524]
按需印刷Propositio Johannis Russell, Circa 1476 (1909)[9780548792537]