646 SERIES CLASSIFICATION PRACTICE (R)
Indicators
First Undefined; contains a blank (^)
0 Current numbering example [OBSOLETE]
1 Earlier numbering example [OBSOLETE]
Second Undefined; contains a blank (^)
Subfield Codes
$a Series classification practice (NR)
c Volumes are classified as a collection
m Volumes are classified with main or other series
s Volumes are classified separately
$d Volumes/dates to which classification practice applies (NR)
$5 Institution/copy to which field applies (R)
$6 Linkage (NR)
$8 Field link and sequence number (R)