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In Unique/shared title list exports, Local Call Number and Location are specific to each item associated with a title while Number of Circulations and Last Circulated Date are specific to a title (OCLC Number). Be aware that:
Example
If you have three distinct copies of the same title (Copies A, B, and C) and Copy A circulated one time, Copy B circulated 5 times, and Copy C circulated three times, then the value of Number of Circulations will be 9 for all three item entries in the export.