Which source is most likely to be scholarly and may use librarians to select sites to include

Search Engines.

Explanation:

Search engines are most likely to be scholarly and may use librarians to see sites. Search engines propose them trustworthy websites that assist to explore different sources including books, references, dissertations, articles, essays, etc. from various websites, professional societies, academic publishers, etc. Thus, 'search engines' would be the most likely used scholarly source for librarians to look for authentic and reliable information.

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