MARC21       007g'01  Specific material designation
     Values: 
              #   Not a motion picture or filmstrip [obs.]
              #   No attempt to supply code [obs.]
              c   Filmstrip cartridge
              d   Filmslip
              f   Other filmstrip type
              n   Not applicable [obs.]
              o   Filmstrip roll
              s   Slide
              t   Transparency
              z   Other