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If you have collected research in reference management software like RefWorks or Endnote and would like to import that research into Zotero, first export your references from the program (via the References menu in RefWorks | via the Format tab in EndNote) and then, in Zotero, click the gear icon and select “Import…”. Browse to your file, select it, and click the “Open” button. This should import the exported items into your Zotero library in a date-stamped collection.