Policy documents, reports, and conference proceedings are types of gray literature. Gray literature is produced by governments, universities, corporations, think tanks, professional societies, and similar organizations. While it does not go through the same review or publishing process as scholarly books or journal, it is often written by researchers or practitioners in the field or discipline.
Where do I find reports, proceedings, and other "gray literature?"
Gray literature can be difficult to find, as it is (usually) not included in research databases. Consider these tips to help you find gray literature: