Grey Literature
Research produced outside commercial or academic publishing, such as reports, theses, working papers, and government or NGO documents.
Grey literature is material produced outside conventional academic and commercial publishing channels. It includes government and agency reports, theses and dissertations, conference papers, working papers, policy documents, and technical standards. Because it is not always peer reviewed and can be hard to find through standard databases, it requires extra care in both searching and appraisal.
For thesis work, grey literature matters in two ways. First, it can hold data and practical detail that journals never publish, especially in policy, education, and health fields; ignoring it can bias a review toward published, positive results. Second, other theses show you how projects like yours were structured and examined. When you use grey sources, assess who produced them and why, and cite them precisely so examiners can locate them.
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