007/04 Microform: Dimensions

007/04

Microform

(/00 = h )

Dimensions

(Variable Control Field - Physical Description Fixed Field)

Character position definition and scope:

A one-character alphabetic code indicates the dimensions of the microform , not the dimensions of the image. For example, 16 mm. images on 35 mm. microfilm are coded f (35 mm.). Only the most common dimensions are indicated.

Only codes that exactly match the measurement of the item as given in the physical description should be used. If no code exactly matches, code z (Other) is used.

Record requirements for National-level records: Mandatory; for Minimal-level records: Optional.

Guidelines for applying content designators:

*Codes*:	*Descriptions*:
Microfilm: (Exact width of the microfilm in millimeters.)
a	8 mm.
d	16 mm.
f	35 mm.
g	70 mm.
h	105 mm.

Microfiche and Microopaque: (Exact height and width of the microfiche or microopaque in inches or centimeters)
l	3x5 in. or 8x13 cm.
m	4x6 in. or 11x15 cm. The standard microfiche (105 mm. x 148 mm.) is coded m.
o	6x9 in. or 16x23 cm.

Aperture cards: (Exact height and width of an aperture card in inches or centimeters.)
p	3-1/4 x 7-3/8 in. or 9x19 cm.

All other:
u	Unknown The dimensions are unknown.
z	Other Dimensions for which none of the other defined codes is appropriate.

To return, select:

007: Microform

007 Physical Description Fixed Field