Yet Another New Catlogue listing requried [solved]

Unless its under some other descriptor already, can we please have the following additional Catalogue reference added in the Banknote drop down list of reference Numbers.

We need to add 'C' (C #) - short for Lance K. Campbell who published a leading catalogue on POW money called "Prisoner of War and Concentration Camp Money of the 20th Century"- June 1993; ISBN-13: 978-0931960321 & ISBN-10: 0931960320

Hello,
I added this as "Campbell #" as "C #" is taken
Best