MARC21       039     Level of Bibliographic Control and Coding Detail [obs.]
  Subfields: 
             $a   Level of rules in bibliographic description [obs.]
                  ** 0 No level defined by rules [obs.]
                  ** 1 Minimal [obs.]
                  ** 2 Less than full [obs.]
                  ** 3 Full [obs.]
             $b   Level of effort used to assign nonsubject heading access points
[obs.]
                  ** 2 Less than full [obs.]
                  ** 3 Full [obs.]
             $c   Level of effort used to assign subject headings [obs.]
                  ** 0 None [obs.]
                  ** 2 Less than full [obs.]
                  ** 3 Full [obs.]
             $d   Level of effort used to assign classification [obs.]
                  ** 0 None [obs.]
                  ** 2 Less than full [obs.]
                  ** 3 Full [obs.]
             $e   Number of fixed field character positions coded [obs.]
                  ** 0 None [obs.]
                  ** 1 Minimal [obs.]
                  ** 2 Most necessary [obs.]
                  ** 3 Full [obs.]

 Indic/etc.: 1st: Standard against which the data were applied [obs.]
             0 U.S. national level bibliographic record [obs.]
             8 Other [obs.]
             2nd: Undefined; contains a blank (#) [obs.]