MARC21       007v'01  Specific material designation
     Values: 
              #   Not a motion picture, filmstrip, or 
                  videorecording [obs.]
              #   No attempt to supply code [obs.]
              c   Videocartridge
              d   Videodisc
              f   Videocassette
              n   Not applicable [obs.]
              r   Videoreel
              z   Other