- Schultz, F. A. (Fredrik A.)2
- Senex, John, -17402
- Setterson, Dale R.2
- Sewall, Joseph S. (1827-1917)2
- Sherman, Fred D.2
- Simerl, R. A.2
- Smith, E. R. (Edgar Russel) (Publisher)2
- Smith, John Calvin2
- Smith, William G. (Surveyor)2
- Sotzmann, D. F.2
- Stanford, Edward, 1827-19042
- Stephens, A. D.2
- Stump, Edmund2
- Sveriges geologiska undersoĢkning2
- TacheĢ, A. M2
- Taride, A2
- Taylor, Richard B.2
- Tennessee. State Geological Survey2
- The Farmer [magazine] (Publisher)2
- Thrasher, Frederic Milton, 1892-19622