| dc.description.abstract | Grey literature consists of documents of very different types. There are some types typical of grey literature, such as scientific and technical reports, and also some types which evoke different opinions. This latter type, such as DŻS documents (documents pertaining to society), standards and patents, can be included in grey literature only because of the specific point of views held in these documents. There are also some specific types of grey literature mentioned particularly by Polish authors and collected by Polish libraries. There are a variety of different historical, economic and social reasons for this. The discussion of these documents’ difference from other grey literature begins with a definition of grey literature. For an effective discussion of the different types of grey literature it is important to have an exact definition of the group of literature. A well-known definition was adopted outlining that grey literature consists of those publications “produced at all levels by government, academia, business and industry, both in print and electronic formats, but which is not controlled by commercial publishing interests, and where publishing is not the primary business activity of the organization. | en_US |
