Guidelines for Usage: 664 Complex See Reference - Name

NACO LSP Usage:

Simple cross references are preferred over complex cross references . A reference record containing a 664 field is used only when the relationship of an unestablished name and one or more established names cannot be adequately expressed by simple see also cross references constructed from the 1XX Heading and multiple 4XX See From Tracing fields in an established heading record.

LC NACO must be consulted before this field is used.

LC Usage:

Since January 1981, LC uses field 664 in a reference record only when the relationship of an unestablished name and one or more established names cannot be adequately expressed by simple see also cross references constructed from field 1XX and multiple 4XX fields in an established heading record.

Reference records created by LC prior to January 1981 that are no longer valid under this practice are deleted and the subfield $w coding in the 4XX fields in the established heading record are adjusted whenever the record must be changed for any reason.

Prior to March 1984, LC used field 664 in a reference record for complex see also references. These reference records contain an established heading in the 1XX field and a see also reference in field 664. The evaluation of references process in an existing authority record may result in the deletion of the reference record and either the addition of a 663 Complex See Also Reference field to the related established heading record or the adjustment of the subfield $w coding in the existing 5XX fields.

For more information on LC Guidelines, select:

Guidelines for Usage: NACO/LSP and LC

To return:

Use the key.