You have chosen 'Substance and Individuation in Leibniz' by Cover,J/O'Leary-Hawthorne,J, 'Preface to 'De Revolutionibus'' by Andreas Osiander and 'World and Essence' by Alvin Plantinga
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| A. | Nature of Mathematics | |
| B. | Foundations for Mathematics | |
| C. | Sources of Mathematics |