010 - Library of Congress Control Number (NR)

First Indicator
Undefined
# - UndefinedSecond Indicator
Undefined
# - Undefined




Subfield Codes
$a - LC control number (NR)
$b - NUCMC control number (R) $z - Canceled/invalid LC control number (R)
$8 - Field link and sequence number (R)



FIELD DEFINITION AND SCOPE

Unique number assigned to a MARC record by the Library of Congress. Valid MARC prefixes for LC control numbers are