First Indicator Undefined # - Undefined |
Second Indicator Undefined # - Undefined |
Subfield Codes |
|
$a - Chronological term (NR) $v - Form subdivision (R) $x - General subdivision (R) $y - Chronological subdivision (R) |
$z - Geographic subdivision (R) $6 - Linkage (NR) $8 - Field link and sequence number (R) |
In an established heading record, field 148 contains the established form of a chronological term. In records for references, this field contains an unestablished form of a chronological term.
Guidelines for applying the content designators defined for field 148 and input conventions are given in the X48 Chronological Terms-General Information section.
148 | ##$a1710-1714 | ||||||||
148 | ##$a1500-1700 | ||||||||
148 | ##$a1863 |
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