MARC21       755     Established Heading Linking Entry--Genre/Form Term (R)
             $a   Genre/form term as entry element
             $u   Record control number (R)
             $v   Form subdivision (R)
             $w   Control subfield
   ** 0 Link display
   .... a Link not displayed
   .... b Link not displayed, field 788 used
   .... c Link not displayed, non-7XX field used
   .... n Not applicable
             $x   General subdivision (R)
             $y   Chronological subdivision (R)
             $z   Geographic subdivision (R)
             $2   Source of heading or term
             $5   Institution to which field applies
             $6   Linkage
             $8   Linking number

 Indic/etc.: 1st: Undefined; contains a blank (#)
             2nd: Subject heading system/thesaurus
             0 Library of Congress Subject Headings
             1 LC subject headings for children's literature
             2 Medical Subject Headings/NLM authority files
             3 National Agricultural Library subject authority file
             4 Source not specified
             5 Canadian Subject Headings/NLC authority file
             6 Repertoire des vedettes-matiere/NLC authority file
             7 Source specified in subfield $2

2013 -05 -02
Auszug aus der allegro - Formatedatenbank
(c)2005 UB Braunschweig