The Index Islamicus database indexes literature on Islam, the Middle East and the Muslim world.
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The Index Theologicicus indexes both American and European religion and theology journals which can be searched by subject, author, title, or document source.
Working together with the generous support of Prince Alwaleed Bin Talal, the Harvard University Library's Open Collections Program has digitized hundreds of Islamic manuscripts, maps, and published texts from the institution's vast holdings.
Luthers Werke on the World Wide Web reproduces the Weimar Edition in electronic form.