Tables do not have to just present statistical information. They can be used to show different archival collections, database categories that were used in research, or periodizations and associated phenomona. Remember that column labels and categories should be clearly presented. The Conclusion is an important part of the poster. Where appropriate, for granting agencies, librarians and archivists, or those who provided a place for your research, you might consider a brief acknowledgments section.
References Concentrate on key references only.
This is not meant to be an exhaustive listing of sources, either in terms of the subject area or your own research. While you want to show your expertise in the area, and back up your ideas, remember that you can expand on the discussion of sources directly with your readers during the poster session.