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SuDocs Classification System
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The SuDocs (Superintendent of Documents) Classification System is used for United States federal government documents.
It was developed by Adelaide Hasse in the Library of the Government Printing Office (GPO) between 1895 and 1903. Classification numbers are assigned based on government organization authorship.
In libraries, publications of the U.S. government are usually assigned call numbers based on a special classification system created by the U.S. Superintendent of Documents. SuDocs call numbers begin with letters of the English alphabet.
- HE 20.30:112/1 (January 1997 issue of Public Health Reports)
- GPO: Explanation of the Superintendent of Documents Classification System