Grey literature refers to information that, unlike books and journal articles, has be produced outside of the typical commercial publishing channels. It has usually been produced and distributed by an organisation.
Grey literature can include:
As you can tell from this list some would count as much more reliable than others in terms of their quality and usefulness for research purposes.
While grey literature can be very useful for research, it can be tricky to find. Often the best place to go is to look through the resources on a particular organisation or Government department's site.
Overton is a searchable index of global policy documents, guidelines, think tank publications and working papers. Explore policy documents citing research from the University of Waikato, or search for specific authors or articles that have been cited in policy documents.
The New Zealand Legal Information Institute (NZLII) provides free access to legal information in New Zealand.
ProQuest Dissertations & Theses Global is the world's most comprehensive collection of dissertations and theses from around the world, offering millions of works from thousands of universities. Full-text coverage spans from 1743 to the present, with citation coverage dating back to 1637.
Other university repositories from across Aotearoa.