Leader/07 - 09 Undefined character positions (Leader)
These three character positions are undefined; each contains a blank (#)
### Undefined character positions
When holdings information is embedded in a USMARC bibliographic record, these three blanks and the Leader/06 code are contained in subfield $a (Type of record) of field 841 (Holdings Coded Data Values) , which is also embedded in the bibliographic record.
See also:
