MARC21       008a'24-27  Nature of contents
     Values: 
              #   No specified nature of contents
              a   Abstracts/summaries
              b   Bibliographies
              c   Catalogs
              d   Dictionaries
              e   Encyclopedias
              f   Handbooks
              g   Legal articles
              h   Handbooks [obs.]
              i   Indexes
              j   Patent document
              k   Discographies
              l   Legislation
              n   Surveys of literature in a subject area
              o   Reviews
              p   Programmed texts
              q   Filmographies
              r   Directories
              s   Statistics
              t   Technical reports
              v   Legal cases and case notes
              w   Law reports and digests
              y   Yearbooks [obs.]