1.   Earlier/later references are special types of "see also" (5XX) cross references.  They are used to record a sequential relationship between corporate headings.

2.   Earlier/later references are normally made only to connect immediately adjacent headings, thus creating a chain of "see also" references leading from one heading to another.

3.   Full information about earlier/later references may be found in the LCRI 26.3B-C, along with several pages of examples.  Please refer to that section for a more complete explanation of earlier/later references.

4.   All headings connected by these references must be represented by a NAR in the LC/NAF.  All headings and references must be in correct AACR form.  Establish any heading not yet in the LC/NAF, including those for which there are no bibliographic records.

5.   In source citations (670 or 675), generally cite only sources that deal with the immediately preceding and succeeding headings.

6.   Always give the citation for the item being cataloged in a 670 field.  Give other source citations as necessary.

7.   If a source gives only a name not used in the heading or 4XX, cite the source in the 675 field.

8.   Justification of preceding and succeeding headings is not required for:  (1) changes in a government heading because of an official language change; (2) changes involving only a parent body to which the body being established is subordinate.

Examples of a Chain of See Also References (i.e., Earlier/Later Headings):

110 2# $a Dropsie College for Hebrew and Cognate Learning

510 2# $w b $a Dropsie University

670 ## $a Essays on the occasion of the seventieth anniversary of the Dropsie University, 1909-1979, c1979 (a.e.): $b t.p. (Dropsie University) verso t.p. (Dropsie Univ., Philadelphia) p. x (organized in 1907; chartered in 1909 as the Dropsie College for Hebrew and Cognate Learning; in 1969 the name was changed to Dropsie University)

110 2# $a Dropsie University

510 2# $w a $a Dropsie College for Hebrew and Cognate Learning

510 2# $w b $a Annenberg Research Institute

670 ## $a Essays on the occasion of the seventieth anniversary of the Dropsie University, 1909-1979, c1979 (a.e.): $b t.p. (Dropsie University) verso t.p. (Dropsie Univ., Philadelphia) p. x (organized in 1907; chartered in 1909 as the Dropsie College for Hebrew and Cognate Learning; in 1969 the name was changed to Dropsie University)

670 ## $a PAnR files, 4/27/2005 $b (Dropsie University; formerly named Dropsie College for Hebrew and Cognate Learning; later changed name to Annenberg Research Institute)

110 2# $a Annenberg Research Institute

510 2# $w a $a Dropsie University

510 2# $w b $a University of Pennsylvania. $b Center for Judaic Studies

670 ## $a Jewish quarterly review, July/Oct. 1987: $b t.p. (Annenberg Research Institute)

670 ## $a PPAnR files, 4/27/2005 $b (Annenberg Research Institute; formerly named Dropsie University; became University of Pennsylvania, Center for Judaic Studies in 1993; located in Philadelphia, Pa.)

110 2# $a University of Pennsylvania. $b Center for Judaic Studies

510 2# $w a $a Annenberg Research Institute

670 ## $a Medoff, J. Collection, 1901-1919 $b (collection located at University of Pennsylvania, Center for Judaic Studies)

670 ## $a PPAnR files, 4/27/2005 $b (University of Pennsylvania, Center for Judaic Studies; new name for Annenberg Research Institute, 1993)

See also:

Section I:  New Authority Records