Microform:
Microform is a generic term for any medium, transparent or opaque, bearing microimages. A microimage is a unit (e.g., a page) of textual, graphic, or computer-generated material that is contained on aperture cards, microfiche, microfilm, microopaques, or other microformats and that is too small to be read without magnification. Microforms may be reproductions of existing textual or graphic materials or they may be original publications.
Microforms, whether original or reproductions, are not identified in the Leader/06 of a bibliographic record as a special type of bibliographic record; instead, they are included with the associated type of material record. Type of microform can be described in Fixed-Length Data Elements field 008/23 Form of item (in Books or Serials format) and in field 007 Physical Description Fixed Field (code h in 007/00 Category of material)
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