An established topical term or geographic name used in main subject headings in established heading records.
Russian equivalent of field 150.
$a - Topical term or geographic name entry element (NR). In UNBIS, the complete topical or geographic term is entered in $a.
150 $a OFF-ROAD VEHICLES
997 $a ÒÐÀÍÑÏÎÐÒÍÛÅ ÑÐÅÄÑÒÂÀ ÏÎÂÛØÅÍÍÎÉ