A supplement with an independent numbering scheme is considered a separate serial and described in a separate bibliographic record.
For a supplement described in a separate bibliographic record, the numbering scheme of the supplement is recorded in the holdings record for the supplement. For example, the library holds volumes 66-69 of Beiheft zur A for 1965-1968, which is represented by its own bibliographic record. Record holdings as:
|866||4||1||‡8 0 ‡a v.66(1965)-v.69(1968)|
A supplement that is not described in a separate bibliographic record and not contained within a basic bibliographic unit (i.e., one of the segments of the publication sequence of a serial as designated by the publisher) is recorded in the holdings record in field 867 in the form:
EXAMPLE (item states: "Supplement to v.14, 1914 of The antiquarian"):
|866||4||1||‡8 0 ‡a v.1(1900)-v.12(1912),|
|866||4||1||‡8 0 ‡a v.14(1914),|
|866||4||1||‡8 0 ‡a v.18(1918)-v.24(1924)|
|867||4||1||‡8 0 ‡a v.14:suppl.|
For supplements with numbering related to a particular volume or issue of the parent serial, all hierarchical levels of the enumeration and chronology data appearing on the publication are recorded in the holdings record. In the following example, there exist multiple numbered and dated supplements to v.18; library has supplement 2.
|867||4||1||‡8 0 ‡a v.18:suppl.2(1918:June 1)|
Supplement holdings are compressed if it is possible to do so. For example, if it is known that every volume is accompanied by supplements within a given range, compress as follows in the volume holding statement:
|867||4||1||‡8 0 ‡a v.31:suppl.-v.35:suppl.|