662 ADDED Subject Added Entry - Hierarchical Place Name (R)Indicators - Both undefined; each contains a blank (^)Subfield Codes $a Country or larger entity (R) $b First-order political jurisdiction (NR) $c Intermediate political jurisdiction (R) $d City (NR) $e City subsection (R) $f Other geographic regions or features (R) $g Extraterrestrial area (R) $h Extraterrestrial area (R) $2 Source of heading or term (NR) $4 Relator code (R) $6 Linkage (NR) $8 Field link and sequence number (R)