- Ragsdale & Chassell (Firm)1
- Raney, J. H.1
- Rauscher, Willis F.1
- Rutledge, Wiley, 1894-19491
- Sinn, Eugene1
- Smith, Roswell Chamberlain, 1797-1875.1
- Strum, G. P. (Gustave P.)1
- Successful Farming Publishing Co.1
- Tanner, Henry Schenck, 1786-1858.1
- Tester, Allen C. (Allen Crawford), 1897-1
- Theo. W. Ohman Map Co.1
- Union Pacific Railroad Company.1
- United States. Bureau of Public Roads1
- United States. Post Office Department1
- United States. Public Roads Administration.1
- Vandermaelen, Philippe, 1795-18691
- Von Berg, John1
- Waterloo Zoning Commission.1
- Wells, J.1
- Woolbert, R. L.1