665 FieldDo not use this field. Refer to MARC 21 Authority Format, 665 History Reference, LCGuidelines.86
667 FieldI. When adding a "Not the same as" or "Cannot identify with" 667 note to a new authorityrecord, it may be helpful to add a corresponding 667 to the existing record.Example:(new record being added):100 1 $a Thomas, Edward, $c printer, <strong>of</strong> London400 1 $a Thomas, E. $q (Edward), $c printer, <strong>of</strong> London667 $a Cannot identify with: Thomas, Edward, printer670 $a The interesting history, <strong>of</strong> little King Pippin, 1820: $b p. 40 (E. Thomas;printer, Golden Lane, Barbican, London)670 $a Todd, W.B. Directory <strong>of</strong> printers ... London & vicinity 1800-1840, 1972 $b(Thomas, Edward; printer in London, active 1808-1837)(existing record in the LC/NAF, 667 added):100 1 $a Thomas, Edward, $c printer667 $a Cannot identify with: Thomas, Edward, printer, <strong>of</strong> London670 $a Little Tommy, 1858: $b t.p. (Edward Thomas; printer, Chester, England)Note that this information is better reflected in 670 notes.II. If a linking reference would normalize to the same form as the heading or anotherreference on the same record or to the same form as a heading on another record, add an"Old catalog heading" 667 note. It may also be necessary to use this 667 note if thelinking reference method <strong>of</strong> tracing a pre-AACR2 LC heading is not appropriate (SeeDCM Z1, Introduction).100 0 $a Napoleon $b I, $c Emperor <strong>of</strong> the French, $d 1769-1821667 $a Old catalog heading: Napoléon I, Emperor <strong>of</strong> the French, 1769-182187