10.5A. Preliminary rule

10.5A1 Scope

See 1.5A. This area covers the physical description of records on microform. Provide information about the physical details of material on the microform in a note. See 10.8B2.

10.5A2. Punctuation

For instructions on the use of spaces before and after prescribed punctuation, see 1.0C.
Precede each occurrence of this area either by a full stop, space, dash, space or start a new paragraph.
Precede other physical details (i.e., other than extent and dimensions) by a colon.
Precede dimensions by a semicolon.

10.5B. Extent of descriptive unit (including specific material designation)

10.5B1.

Record the extent of the microform for the unit being described in arabic numerals and one of the following terms as appropriate:

  • aperture card
  • microfiche
  • microfilm
  • microopaque

Add cartridge, cassette, or reel, as appropriate, to microfilm. Add cassette, if appropriate, to microfiche.

If appropriate, follow the extent with a phrase indicating the special class of material, if this does not duplicate the GMD.

3 microfilm reels of textual records

10.5B2.

Optional addition. If a further measurement of extent is required, add such information in parentheses after the primary statement of extent.

45 microfiches of cartographic materials (100 maps)

1 microfilm reel (250 photographs)

1 microfiche (55 fr.)

10.5C. Other physical details

10.5C1.

If a microform is negative, indicate this.

1 microfilm reel : negative, silver halide

10.5D. Dimensions

10.5D1.

If appropriate, at all levels of description, give the dimensions of a microform as set out in the following rules. Give a fraction of a centimetre as the next whole centimetre up.

10.5D2. Aperture card.

Give the height x width of an aperture card mount in centimetres.

20 aperture cards ; 9 x 19 cm

10.5D3. Microfiche.

If the dimensions of a microfiche are other than 10.5 x 14.8 cm., give the height x width in centimetres.

1 microfiche ; 12 x 17 cm

15 microfiches ; 11 x 15 cm – 12 x 17 cm

10.5D4. Microfilm.

Give the width of a microfilm in millimetres.

1 microfilm reel ; 16 mm

1 microfilm cartridge ; 35 mm

10.5D5. Microopaque.

Give the height x width of a microopaque in centimetres.

5 microopaques ; 8 x 13 cm

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