What is grey literature?
Grey literature refers to research that is either unpublished or has been published in non-commercial form. It can include:
Grey literature can be a good source of raw data (statistics). It is likely to be more sector or industry focused rather than academic, and can be used effectively in conjunction with academic sources. It is often international, open access, and freely available.
Theses and Dissertations
Here you can find:
DART-Europe is a partnership of research libraries and library consortia who are working together to improve global access to European research theses.