Andrew, per http://vufind.org/wiki/authority_control

>> for the id control number:
there are 2 numbers involved (one of the local library system, and another for the Library of Congress maintaining and assigning these headings for all library systems all the same); do you need only one id/control number, and if yes, which?
--
Ya’aqov Ziso, eResources-Serials, Rowan University
856 256 4804 ziso@rowan.edu