Established heading:

Code a (008/09) indicates that the 100-151 field contains an established name or subject heading that is authorized for use as the lead element in constructing certain access points of a bibliographic record. An established heading record may also contain 4XX / 5XX tracing fields for variant and related headings and notes recording information such as the source used to establish the heading and information explaining scope and usage.

If an established 15X heading may also be used as a subject subdivision,

code f is used in 008/09 when an organization uses one authority record to convey this dual function.

When separate records are created,

code a is used for the established heading record, and

code d is used for the subdivision record.

Examples:

008/09 a

100 1#$aMattern, Hermann,$d1902-1971

008/09 a

130 #0$aBulletin (Ahmadu Bello University. Dept. of Geology)

008/09 a

151 ##$aIowa$xDescription and travel$y1981-

008/09 a

150 ##$aChronology

680 ##$iThe term$aChronology$ior$aHistory--Chronology$imay also be used as a subdivision under names of persons, places, [...]

[A separate record is created for the subject subdivision Chronology.]

To return, select:

008/09 Kind of record