The World of the Red Sun
Clifford D. Simak
Out Around Rigel
Robert H. Wilson
The Infra-Medians
Sewell Peaslee Wright
Wonder Stories 1931-11
Wonder Stories
Astounding Stories 1931-11 v08n02
Astounding Stories
The Planetoid of Peril
Paul Ernst
Raiders Invisible
E. V. Lucas & Desmond W. Hall
The Rat Racket
David H. Keller
Tetrahedra of Space
P. Schuyler Miller
Spawn of the Comet
H. Thompson Rich
Hawk Carse
Harry Bates & Desmond W. Hall
Hawk Carse (1)
The Terror from the Depths
John Hanson (1)
Amazing Stories 1931-10
Amazing Stories
Wonder Stories 1931-10
Amazing Stories Quarterly 1931 Fall v04n04
Amazing Stories Quarterly
Astounding Stories 1931-10 v08n01
The Red Hell of Jupiter
In the Orbit of Saturn
R. F. Starzl
The Heads of Apex
Francis Flagg & David Baldwin
The Solar Magnet
S. P. Meek
Doctor Bird and Operative Carnes (1)