MARC21       852     Location/Call Number (R)
  Subfields: 
             $a   Location
             $b   Sublocation or collection (R)
             $c   Shelving location (R)
             $e   Address (R)
             $f   Coded location qualifier (R)
                  ** 0 Qualifier type
                  .... l Latest
                  .... p Previous
                  ** 1 Number of units
                  .... 1-9
                  ** 2 Unit type
                  .... m Month(s)
                  .... w Week(s)
                  .... y Year(s)
                  .... e Edition(s)
                  .... i Issue(s)
                  .... s Supplement(s)
             $g   Non-coded location qualifier (R)
             $h   Classification part
             $i   Item part (R)
             $j   Shelving control number
             $k   Call number prefix
             $l   Shelving form of title
             $m   Call number suffix
             $n   Country code
             $p   Piece designation
             $q   Piece physical condition
             $s   Copyright article-fee code (R)
             $t   Copy number
             $x   Nonpublic note (R)
             $z   Public note (R)
             $2   Source of classification or shelving scheme (NR
             $3   Materials specified
             $8   Link and sequence number
 Indic/etc.: 1st: Shelving scheme
             # No information provided
             0 Library of Congress classification
             1 Dewey Decimal classification
             2 National Library of Medicine classification
             3 Superintendent of Documents classification
             4 Shelving control number
             5 Title
             6 Shelved separately
             7 Source specified in subfield $2
             8 Other scheme
             2nd: Shelving order
             # No information provided
             0 Not enumeration
             1 Primary enumeration
             2 Alternative enumeration