NACO: Non-Unique Records
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Princeton University Cataloging Documentation

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Non-unique records: Guidelines and Examples

The heading on an undifferentiated personal name record (also known as a non-unique record) represents more than one individual. When changing an existing unique personal name record to a non-unique record, change the value in the UPN fixed field from "a" to "b".

In the following examples, notice the bracketed 670 field preceding the 670 field(s) for each person represented on the record. When adding a person to an existing record that is not already non-unique, you must add this field before the first 670 field for the person for whom the record was originally created. If you cannot determine the type of authorship involved, use Added entry on ... or Entry on ... with the title proper from the following 670 citation. Also add two 670 fields for the work you have cataloged, according to the following pattern:

    670 [Author of A history of witchcraft]
    670 A history of witchcraft, 1981-1982:‡bv. 1-2, t.p. (Jean Mason)
Consult the NACO Coordinator for guidance on the special citation form to use if one of the personal names in conflict is from an LC bibliographic record.

Add a 675 field to list the reference sources you have consulted.

  • If the existing record already contains a 675 field, do not create another one. Add your sources to the existing 675 field. Remember that the 675 field is not repeatable. In cases where no sources are available, the 675 field is omitted.
Example 1
Example 2
In example 2, notice that personal names which normalize to the same string of characters are represented on the same non-unique record. However, the heading on the bibliographic record for each author will show the name as represented in the 670 field for that author, that is, as found on the item cataloged, with appropriate diacritics.