We had this same problem at the University of Maryland when working on our finding aids. What we have discovered in our case is that 99% of the time, our appendices weren't really appendices. They were bibliographies, and more related material. In most cases, we've re-evaluated each appendix and found the proper home for it. In those unusual cases, we're using <odd>. If anyone has an alternate solution, I'd love to hear it. I'd never considered putting them in the <c> before.
Jennie A. Levine
Curator for Historical Manuscripts
Archives and Manuscripts Department
University of Maryland
College Park, MD 20742
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