Projects of this nature are dependent upon significant contributions of time by archivists and the support of the institutions that employ them. Therefore, special thanks are due to the American Heritage Center at the University of Wyoming; the Harvard University Archives; the L. Tom Perry Special Collections at Brigham Young University; the Library of Congress Manuscript Division; David M. Rubenstein Rare Book and Manuscript Library, Duke University; the Rockefeller Archive Center; Scholarly Resources and Special Collections at Case Western Reserve University; and the Special Collections Technical Services Department, University of North Carolina at Chapel Hill.