| Sign of Life
Dave Dryfoos | |
| Sign of the Green Arrow / A Mystery Story
Roy J. Snell | |
| Sign talk
Ernest Thompson Seton | |
| Signal in the Dark
Mildred A. Wirt | |
| Signal Red
Henry Guth | |
| Signalling across space without wires / being a description of the work of Hertz & his successors
Sir Oliver Lodge | |
| Signelil, A Tale from the Cornish, and Other Ballads
George Borrow | |
| Signers of the Declaration / Historic Places Commemorating the Signing of the Declaration of Independence
Unknown | |
| Significant Achievements in Space Bioscience 1958-1964
United States. National Aeronautics and Space Administration | |
| Signing the Contract, and What It Cost
Martha Finley |
