An Examination of the Superintendent of Documents Classification System, as Currently Used in the Library of the Division of Public Documents, United States Government Printing Office, and as Catalog Numbers for the Stocks of Government Publications Sold by the Superintendent of Documents by United States. Superintendent of Documents. Library 1955
An Explanation of the Superintendent of Documents Classification System by United States. Superintendent of Documents. Depository Administration Branch 1990
An Explanation of the Superintendent of Documents Classification System by United States. Superintendent of Documents. Library 1963
Instructions to Depository Libraries by United States. Superintendent of Documents. Library and Statutory Distribution Service 1977