- Northern Pacific Railway Company. Land Department1
- Nutter, Frank H., 1853-1932.1
- O'Hara and Zeese Civil engineers and Surveyors1
- Ogaard, Louis A.1
- Oliver Iron Mining Company (Duluth, Minn.). Mining Engineering Department.1
- Pezolt, F.1
- Phillips Petroleum Company1
- Pope, John, 1822-18921
- Power, J. B. (James Buel), 1833-19121
- Ray, F. G.1
- Register Print (Warren, Minn.)1
- Rice & Bell1
- Rice, G. Jay (Original copyright holder)1
- Rivers, John P.1
- Rogers, Henry D. (Henry Darwin), 1808-18661
- Russell, E. S. (Delineator)1
- Saint Paul (Minn.). City Planning Board1
- Sewall, J. S. (Joseph S.)1
- Shedd & Wright Manufacturing Co. (Minneapolis, Minn.)1
- Shedd-Brown Manufacturing Company (Minneapolis, Minn.)1