866 TEXTUAL HOLDINGS--BASIC BIBLIOGRAPHIC UNIT (R)Indicators First Field encoding level # No information provided 3 Holdings level 3 4 Holdings level 4 5 Holdings level 4 with piece designation Second Type of notation 0 Non-standard 1 ANSI Z39.44 or ANSI/NISO Z39.57 2 ANSI Z39.42Subfield Codes $a Textual string (NR) $x Nonpublic note (R) $z Public note (R) $8 Link and sequence number (R)