788 COMPLEX LINKING ENTRY DATA (NR)
Indicators First Undefined; contains a blank Second Thesaurus 0 Library of Congress Subject Headings/LC authority files 1 LC subject headings for children's literature 2 Medical Subject Headings/NLM authority files 3 National Agricultural Library subject authority file 4 Source not specified 5 Canadian Subject Headings/NLC authority file 6 Repertoire des vedettes-matiere/NLC authority file 7 Source specified in subfield $2
Subfield Codes $a Heading referred to (R) $i Explanatory text (R) $u Record control number [OBSOLETE] $2 Source of heading or term (NR) $5 Institution to which field applies (NR) $6 Linkage (NR)