Paul, K. D., & Boyle, D. B. (1995). Guide to research collections of former United States senators, 1789-1995: A listing of archival repositories housing the papers of former senators, related collections, and oral history interviews. Washington: Government Printing Office.

Paul, Karen Dawley., and Diane B. Boyle. Guide to Research Collections of Former United States Senators, 1789-1995: A Listing of Archival Repositories Housing the Papers of Former Senators, Related Collections, and Oral History Interviews. Washington: Government Printing Office, 1995.

Paul, Karen Dawley., and Diane B. Boyle. Guide to Research Collections of Former United States Senators, 1789-1995: A Listing of Archival Repositories Housing the Papers of Former Senators, Related Collections, and Oral History Interviews. Washington: Government Printing Office, 1995.