Peer review is an indicator of quality scholarship. It is the process by which after an author submits its manuscript for publication, a number of recognized researchers in the field (their peers) will evaluate the manuscript and recommend its publication, revision, or rejection. Articles accepted for publication through a peer review process implicitly meet the discipline's expected standards of expertise.
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Secondary sources are materials that have been created by someone such as a historian or a researcher. Secondary sources interpret and analyze data gathered from primary sources. They are one or more steps removed from the time of the event. Examples of secondary sources include: