"1999 and 2000 Worksheets; 2001 Estimates, 2003" tax estimates, deductions, 1999 - 2003, Box: 3, Folder: 11. John and Frances Peterson collection, RH MS 1330. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/195146 Accessed May 17, 2024.