Subfield code $5 - Institution to which field applies  (Appendix A:  Control Subfields)

Subfield $5 contains the MARC code of the institution or organization that has added a tracing, reference, or linking entry field to an authority file record.  It is used for institution-specific information that may or may not apply to the universal use of the authority record.

See Appendix G for a listing of organization code sources used in MARC 21 records.

Examples:

400  1#  $aKing, Kennedy$5NNU

485  ##  $vArt songs$5NjP

585  ##  $vAcronyms$5DLC

700  05  $wa$aFrancis, of Assisi,$cSaint,$d1182-1226$5CaOONL

To return:

Use the key.

See also:

Appendix A:  Control Subfields