Duplicates in reports

I fear this is a newbie question. When I compile my bibliography I get duplicate copies of certain items even though I am POSITIVE there are none on my original highlighted list. How can I correct this?
Thanks!
  • could you provide an example? Are any of your items missing - we've been getting reports from people that in some cases multiple items by the same author are replaced by duplicates of the first such item - could that be going on?
    If so, there is unfortunately, no working solution, but I'm sure your help in troubleshooting would be appreciated.
  • A short example appears below, with duplicate entries for Glassberg and Woodward.

    1. James A. Banks, “The historical reconstruction of knowledge about race: implications for transformative teaching,” Educational Researcher 24, no. 2 (March 1995): 15-25.
    2. Ira Berlin, “American slavery in history and memory and the search for social justice,” Journal of American History 90, no. 4 (March 2004): 1251-1268.
    3. Steven Conn, “Don’t Know Much about (the History of) History,” American Literary History 17, no. 4 (Winter 2005): 794-807.
    4. Spencer R. Crew, “Learning from Greensboro: truth and reconciliation in the United States [Review],” Human Rights Quarterly 32, no. 2 (May 2010): 451-4.
    5. Mihaly Csikszentmihalyi, Creativity: flow and the psychology of discovery and invention (New York: HarperCollins, 1996).
    6. David Glassberg, “The past is a foreign country [Review],” The Public Historian 9, no. 3 (1987): 185-187.
    7. David Glassberg, “The past is a foreign country [Review],” The Public Historian 9, no. 3 (1987): 185-187.
    8. Peter Novick, That noble dream: the “objectivity question” and the American historical profession (New York: Cambridge University Press, 1988).
    9. C. Vann Woodward, “A short history of American history,” New York Times Book Review (New York, August 8, 1982).
    10. C. Vann Woodward, “A short history of American history,” New York Times Book Review (New York, August 8, 1982).
  • So did you try to include other items by Woodward and Glassberg?
  • No--this shows everything I wanted, plus the two duplicates.
  • I don't know if it's relevant, but I recently fixed a processor bug that did make it possible to get duplicate items in a bibliography listing. The calling application (Zotero) would need to send the processor a list of ids containing duplicates, but if received, they would render. In the latest processor version (not yet in a Zotero release), the duplicates will be ignored.

    That's not to say that this is necessarily the problem in this case, but it's one possibility.

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