Amazing Stories 1939-04 v13n04
Amazing Stories
Astounding Science-Fiction 1939-04 v23n02
Astounding Stories
Weird Tales 1939-04 v33n04
Weird Tales
Marvel Science Stories 1939-04/1939-05 v01n04
Marvel Science Stories
Thrilling Wonder Stories 1939-04 v13n02
Thrilling Wonder Stories
Argosy Weekly 1939-04-01 Seven Out of Time (Part 4 of 6) / The ...
The Argosy
Argosy Weekly 1939-04-08 Seven Out of Time (Part 5 of 6) / Out ...
Argosy Weekly 1939-04-15 Seven Out of Time (Part 6 of 6)
Argosy Weekly 1939-04-22 Minions of the Moon (Part 1 of 3)
Argosy Weekly 1939-05-06 Minions of the Moon (Part 3 of 3) / ...
Argosy
Argosy Weekly 1939-05-13 The Time Is at Hand
Argosy Weekly 1939-05-27 Tomorrow
The Weapon Too Dreadful to Use
Isaac Asimov
Robots, Empire, Foundation (2)
Employment
L. Sprague de Camp
Almuric
Robert E. Howard
Cross of Fire
Lester Del Rey
The Day Is Done
Tomorrow
Arthur Leo Zagat
Tomorrow (1)
Amazing Stories 1939-05 v13n05
Startling Stories 1939-05 v01n03
Startling Stories