Wikipedia:Identifying and using tertiary sources: Difference between revisions

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* [[Abstract (summary)|Abstracts]] of journal articles, legislation, etc., provided by indexing services and specialized search engines.
 
Some of the above kinds of tertiary sources are considered forms of [[secondary literature]] in some disciplines, but {{em|remain tertiary}} (for most of their content) for Wikipedia's purposes including in those disciplines. Not understanding this is a common error by subject-matter experts new to Wikipedia editing.
 
=== Exceptions ===