![G. H. Von Wright. Några anmärkningar om nödvändiga och tillräckliga betingelser (Some remarks concerning necessary and sufficient conditions). Ajatus (Helsinki), vol. 11 (1942), pp. 220–239. | The Journal of Symbolic Logic | Cambridge Core G. H. Von Wright. Några anmärkningar om nödvändiga och tillräckliga betingelser (Some remarks concerning necessary and sufficient conditions). Ajatus (Helsinki), vol. 11 (1942), pp. 220–239. | The Journal of Symbolic Logic | Cambridge Core](https://static.cambridge.org/content/id/urn%3Acambridge.org%3Aid%3Aarticle%3AS002248120006326X/resource/name/firstPage-S002248120006326Xa.jpg)
G. H. Von Wright. Några anmärkningar om nödvändiga och tillräckliga betingelser (Some remarks concerning necessary and sufficient conditions). Ajatus (Helsinki), vol. 11 (1942), pp. 220–239. | The Journal of Symbolic Logic | Cambridge Core
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On Certainty (Harper Perennial Modern Thought) (English and German Edition): Ludwig Wittgenstein, G. E. M. Anscombe, G. H. von Wright, Denis Paul, G. E. M. Anscombe: 9780061316869: Amazon.com: Books
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Wittgenstein, by G. H. von Wright, Univ of Minnesota, 1st Edition 1982 Hardback 9780816612109 | eBay
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