BASE is one of the world’s most voluminous search engines especially for academic web resources. BASE indexes more than 150 million curated documents from more than 7,000 sources. You can access the full texts of about 60% of the indexed documents for free (Open Access). BASE is operated by Bielefeld University Library. A research tool for older students.
Bielefeld Academic Search Engine
Resource Link: https://www.base-search.net/