Government Documents Information
From eotcd
A short tutorial explaining the SuDocs Classification System:
http://www.lib.msu.edu/branches/gov/sudocs-basics.jsp
More detailed explanations of SuDocs:
http://www.access.gpo.gov/su_docs/fdlp/pubs/explain.html
http://www.fdlp.gov/collections/selection/372-item-number-system