PUBLICATION PATTERN DATA https://www.oclc.org/bibformats/en/8xx/891.html Subfield 9 dependent Undefined Subfield 9 dependent Subfield 9 dependent Subfield 9 dependent Subfield 9 dependent Subfield 9 dependent Subfield 9 dependent Subfield 9 dependent Undefined Subfield 9 dependent Subfield 9 dependent Subfield 9 dependent Subfield 9 dependent Subfield 9 dependent First level of enumeration Second level of enumeration Third level of enumeration Fourth level of enumeration Fifth level of enumeration Sixth level of enumeration Alternative numbering scheme, first level of enumeration Alternative numbering scheme, second level of enumeration First level of chronology Second level of chronology Third level of chronology Fourth level of chronology Alternative numbering scheme, chronology Pattern note OR Converted Gregorian calendar Type of unit Number of pieces per issuance OR Piece designation Bibliographic units per next higher level Numbering continuity OR Issuing date Frequency OR Break indicator Calendar change OR Nonpublic note Regularity pattern Numbering scheme OR Public note Source of caption abbreviation Materials specified Field link and sequence number Tag of the MARC holdings field