630 - Subject Added Entry--Uniform Title (R)

Indicators 1st -  Nonfiling characters
0-9 - Number of nonfiling characters (initial article plus one space)
2nd -  Subject heading authority or Thesaurus
0 - LC (Library of Congress)
1 - LC subject headings for children's literature (LCAC)
2 - Medical subject heading; conforms to NLM (National Library of Medicine) authority files
3 - National Agricultural Library
4 - Source not specified
5 - Canadian subject headings
6 - French subject headings; Repertoire de vedettes-mateire; conforms to NLC authority fields.
  7 - Source specified in subfield 2
Subfields _a  Uniform title (NR)
  _d  Date of treaty signing (R)
  _e  Relator term (R)
  _f  Date of a work (NR)
_g  Miscellaneous information (NR)
_h  Medium (NR)
_k  Form subheading (R)
_l  Language of a work (NR)
_m  Medium of performance for music (R)
_n  Number of part/section of a work (R)
_o  Arranged statement for music (NR)
_p  Name of part/section of a work (R)
_r  Key for music (NR)
_s  Version (NR)
_t  Title of a work (NR)
_v  Form subdivision (R)
_x  General subdivision (R)
_y  Chronological subdivision (R)
_z  Geographic subdivision (R)
_0  Authority record control number (R)
_2  Source of heading or term (NR)
_3  Materials specified (NR)
_4  Relator code (R)
  _6  Linkage (NR)
  _8  Field link and sequence number (R)
Examples
630 00 _aUkrainian weekly
_xIndexes
_vPeriodicals.
630 07 _aBible.
_pN.T.
_pRomans
_vCommentaries.
_2sears