Guidelines for Recording Holdings:
MARC Field 866 (Textual Holdings - Basic Bibliographic Unit)

This field contains a textual description of the holdings of a basic bibliographic unit.

First Indicator (Encoding Level):
Code	Meaning	Notes
blank	No information provided
3	Level 3 holdings	Use for retrospective holdings and electronic resource holdings
4	Level 4 holdings
Second Indicator (Type of Notation):
Code	Meaning	Notes
0	Non standard	Use for electronic resource holdings and "odd" holdings which are not covered in the standard

1	ANSI/NISO Z39.71 or ISO 10324

Subfield Codes:
Code	Meaning	Notes
\|8	Field Link and Sequence Number	No space before or after the subfield Subfield \|8 is always the first subfield and the linking number is always 1 Example: \|81\|av.1(1992)-v.10(2001)
\|a	Textual Holdings	No space after the subfield Refer to guidelines for captions, enumeration, and chronology Example: \|81\|av.1(1992)-v.10(2001)
\|x	Nonpublic Note	No space before or after the subfield Use for staff notes that relate to the field, not the MARC holdings record as a whole Example: \|81\|av.1(1992)-v.9(2000)\|xv.10(2001) wd/damaged
\|z	Public Note	No space before or after the subfield Use for public notes that relate to the field, not the MARC holdings record as a whole Examples: \|81\|av.1(1992)-v.10(2001)\|zSome issues missing \|81\|av.13:fasc.1-5\|z(unbound)