First and Second indicators:

#  Undefined


a  System control number (NR)

z  Canceled/invalid system control number (R)

6  Linkage (NR)

8  Field link and sequence number (R)

NOTE:  See MARC 21 Format for Bibliographic Data (035 System Control Number) for code definitions not given below.


Field 035 contains a system control number other than that contained in field 001 (Control Number) or input in field 010 (Library of Congress Control Number) or that is contained in field 016 (National Bibliographic Agency Control Number).  Field 035 may be used for control numbers assigned by the institution that created the record or by other institutions.

Each valid system control number must be input in a separate 035 field.  Subfield $a contains the institution's NUC symbol (enclosed in parentheses), followed by the system number.  An invalid or canceled control number is similarly structured in a subfield $z (NUC symbol enclosed in parentheses, followed by control number) and may follow the related valid number in the same 035 field.


035 ## (MiEM)1000-767-0000

035 ## (CU-UC)05266207

035 ## (OCoLC)01625241


$6  Linkage.

For instructions on the use of subfield $6, see field 880.


LC distributes only OCLC control numbers in field 035 of CONSER records.

Related fields, etc.

001, 010, 016

035 System Control Number  (MARC 21 Format for Bibliographic Data)

See also:

01X-09X  Numbers and Codes

Variable Data Fields

Section E.  MARC 21 Format for Serials as Applied Within CONSER

CONSER Editing Guide:  Contents