Science & Engineering
- Tom McMorrow
- I. B. Pole Evans
- William Tenn
- Noel M. Loomis
- Frank Belknap Long
- Douglas Argyll Robertson
- Wallace Umphrey
- Noel M. Loomis
- Fritz Leiber
- Murray Leinster
- Alfred Moquin-Tandon
- Ray Cummings
- Thomas Augustus Jaggar
- William Tenn
- George O. Smith
- Murray Leinster
- Bryce Walton
- George O. Smith
- Theodore Sturgeon
- George O. Smith
- Edmond Hamilton
- Ray Bradbury
- Frank Belknap Long
- John S. Carroll
- Noel M. Loomis
- Ray Bradbury
- Edgar Rice Burroughs
- Noel M. Loomis
- Ray Bradbury
![Proceedings [of the] fourth National Conservation Congress [at] Indianapolis, October 1-4, 1912](https://oldbook.b-cdn.net/kitaplar/7/pg69706-h/images/cover.jpg "Proceedings [of the] fourth National Conservation Congress [at] Indianapolis, October 1-4, 1912")
