| Prototractatus: An early version of Tractatus Logio-Philosophicus Wittgenstein, Ludwig / Used - Hardcover | Michael Knight, Bookseller | | $750.00 |
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| Prototractatus. An early version of Tractatus Logico-Philosophicus. Wittgenstein, Ludwig. McGuinness, B.F.; Nyberg, T.; von Wright, G.H., ed. Pears, D.F.; McGuinness, B.F., trans. von Wright, G.H., historical intro. / Used - Hardcover | Powell's Bookstores Chicago, ABAA | Dust Jacket | $132.25 |
| Prototractatus: An Early Version of Tractatus Logico-Philosophicus Wittgenstein, Ludwig / Used - Hardcover | A Casperson Books | Dust Jacket | $127.00 |
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| Prototractatus. An Early Version of Tractatus Logico-Philosophicus by. Wittgenstein, Ludwig. / Used - Hardcover | Michael R. Thompson Books, A.B.A.A. | Fine/VG+ Dust Jacket | $100.00 |
| Prototractatus: An Early Version of Tractatus Logico-Philosophicus Wittgenstein, Lugwig / Used - Hardcover | Russian Hill Bookstore | Dust Jacket | $75.00 |
| Prototractatus: An Early Version of Tractatus Logico-Philosophicus Ludwig Wittgenstein / Used - Hardcover | Moe's Books | Dust Jacket | $75.00 |