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BASE: [Open Access] Bielefeld Academic Search Engine
BASE is one of world's most voluminous search engines especially for academic web resources. BASE provides more than 110 million documents from more than 5000 sources. You can access full texts of about 60% of the indexed documents free (Open Access). You can also search for full document texts licensed under a Creative Commons license agreement. BASE is maintained and operated by Bielefeld University Library....
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