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Ownership Marking of Paper-Based Materials - By: U.S. Library of Congress, 2008-07-28 Indelible identification marks have traditionally been placed on paper-based materials to help deter their theft and to establish ownership in the event of theft. Some institutions and collectors do not mark their holdings for a variety of reasons. For example, ownership marks cannot guarantee that an item, or portions of it, will not be stolen. COMMENTS Add a comment |