- St. Paul Litho. & Engr. Co.1
- St. Paul Real Estate Board (Saint Paul, Minn.)1
- Steffy, D.A.1
- Tait, A.W.1
- Taralseth, O. H.1
- Thiel, George A. (George Alfred), 1892-19791
- Thomas, J. A. (John A.), 1932-1
- Tipping, Robert G1
- United States. Army. Corps of Engineers1
- United States. Army. Corps of Topographical Engineers1
- United States. Bureau of Public Roads1
- United States. Bureau of Soils1
- United States. Post Office Department1
- United States. Soil Conservation Service1
- United States. Surveyor General1
- University of Minnesota. Agricultural Experiment Station1
- Van De Voorde, B.W.1
- Vandermaelen, Philippe, 1795-18691
- Wagner & M'Guigan1
- Walsh, James F.1