finding hidden duplicates

Hello
when I insert a citation on my word processor, sometimes ENDNOTE gives me duplicates of the same reference. however, when I go back to my endnote library and try to delete the duplicates reference I only fin it one reference instead of two…
as a result, when I print my bibliography, there ference comes duplicated as follows:
Habbershon, T. G., Williams, M. L., & McMillan, I. C. (2003a). A unified systems perspective of family firm performance. Journal of Business Venturing 18, 451-465.
Habbershon, T. G., Williams, M. L., & McMillan, I. C. (2003b). A unified systems perspective of family firm performance. Journal of Business Venturing, 18, 451-465.
How can I see all hidden duplicates?
Thank you

I recommend trying to unformat the references and reformatting it (turning on CWYW again from the appropriate tab of the dialog box, as unformating it turns it off),  I suspect that there is a subtle change to the authors, and it is pulling the “duplicate” from the traveling library.