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PhilPapers is a comprehensive index and bibliography of philosophy maintained by the community of philosophers. Using advanced trawling techniques and large scale crowdsourcing, it monitors all sources of research content in philosophy, including journals, books, open access archives, and personal pages maintained by academics. It also hosts the largest open access archive in philosophy.
The Bergen Electronic Edition contains the text-only "normalized transcription" of The Bergen Electronic Edition of Wittgensteins Nachlass.The collection includes all of Wittgenstein's unpublished manuscripts, typescripts, dictations, and most of his notebooks.
The Nachlass was catalogued by G. H. von Wright in his The Wittgenstein Papers, first published in 1969, and later updated and included as a chapter with the same title in his book Wittgenstein, published by Blackwell (and by the University of Minnesota Press in the U.S.) in 1982.
Gale is a collection of primary and secondary sources. It is a collection of medicine, engineering, history, politics, sociology, philosophy, economics, religion and many other fields of science, books, archival materials and news sources.