Executive Correspondence – Letter dtd 06/27/05 to Chairman Principi from the Niagara River Bi-National Mayors Coalition, letter, July 13, 2005; (https://digital.library.unt.edu/ark:/67531/metadc17319/m1/2/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .