The Superintendent Of Documents (Sudocs) Classification System
- Tutorial for processing government and federal legal documents, created for the American Association of Law Librarians.
- http://www.aallnet.org/sis/gd/tutorial/mod3a.html

Explanation of the Superintendent of Documents Classification System
- Describes the system used to classify U.S. government publications and to arrange the documents collections in most depository libraries as well as in the documents collection of the National Archives. Provided by the Library Division of the U.S. Governm
- http://www.access.gpo.gov/su_docs/fdlp/pubs/explain.html

Learning SuDocs Call Numbers
- Tutorial designed to teach the SuDocs classification or call number system.
- http://www.lib.msu.edu/publ_ser/docs/student/Manual/quizes/sudocsbasics.html