[Asis-l] Percentage of Grey/Gray Literature By Field/Discipline

[Gerry Mckiernan]

    I am greatly interested in  studies that have calculated the  relative percentage of a discipline's literature that is considered grey/gray literature.

A fabricated example:
Overall the literature of agronomy is 40% gray/grey literature 
[CITE]

GRAY LITERATURE DEFINED
[ http://www.moyak.com/researcher/resume/papers/var7mkmkw.html ]

"M. C. Debachere has written that it is easier to describe, rather than define grey literature. Collectively the term covers an extensive range of materials that cannot be found easily through conventional channels such as publishers, "but which is frequently original and usually recent" (Debachere 1995,94). Peter Hirtle in Broadsides vs. Grey Literature defines it as: 

The quasi-printed reports, unpublished but circulated papers, unpublished proceedings of conferences, printed programs from conferences, and the other non-unique material which seems to constitute the bulk of our modern manuscript collections (Hirtle 1991)."

[ http://www.moyak.com/researcher/resume/papers/var7mkmkw.html ]

  To such an amorphous list, one may also wish to add Web/Internet resources, most notably e-prints (of course).

NOTE:   I am *particularly* interested in the Gray/Grey Literature of Psychology.

 [I've just begun a literature review but thought I'd also tap The Wisdom of the Web as well]

  As Always, Any and All contributions, suggestions, comments, queries, questions, basketball coaches,  or Cosmic Insights are Most Welcome.

/Gerry 

Gray/Grey Librarian 
Iowa State University 
Ames IA 50011

gerrymck at iastate.edu