Used in an established heading or established heading and subdivision
record to trace a see from
reference from a topical term or geographic name not used in an
established heading.
Subfield Codes
$a
- Topical term or geographic name entry element (NR). In UNBIS, the complete topical or geographic term is entered in $a.
Examples:
150
$a
OFF-ROAD VEHICLES
450 $a ORVS
450 $a SPORT UTILITY VEHICLES
450 $a SUVS
150
9 _ $a SHANXI (CHINA)
450 9 _ $a SHANSI PROVINCE (CHINA)
450 9 _ $a SHANXI SHENG (CHINA)
150
9 _ $a TOMBOUCTOU
(MALI)
450 9 _ $a TIMBUKTU (MALI)
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