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650 SUBJECT ADDED ENTRY - TOPICAL TERM - Indicators
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First indicator
Level of index term.
Blank
No information provided.
0
No level specified.
1
Primary.
2
Secondary.
[UNBIS began implementation of Primary and Secondary headings on 1 April 1999]
Second indicator
Subject heading system/thesarus.
(Values 0-3 and 5-6 are
authoritative-agency data elements not used in
UNBIS).
UNBIS uses Value=7 only.
7
Source specified in subfield $2.
The subject added entry conforms to the subject Heading/thesaurus building conventions
identified by the USMARC code contained in subfield $2.
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Last updated: 20 June 2008
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