Grey literature is the term used to describe literature that is not formally published as a book or journal article.
It is produced by all levels of government, academia, NGOs, associations and professional organizations.
Grey literature includes:
Use grey literature to:
Grey literature is not easily found and is often excluded from library databases. Some library databases contain grey literature in addition to journal articles. For example:
Please note, that there is some grey literature in Omni. For example, government information and theses.