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Chaptra

Astronauts

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Cover of The Revolt on Venus

The Revolt on Venus

Carey Rockwell

2.7
Cover of Sabotage in Space

Sabotage in Space

Carey Rockwell

3.5
Cover of On the Trail of the Space Pirates

On the Trail of the Space Pirates

Carey Rockwell

2.3
Cover of The Planet Strappers

The Planet Strappers

Raymond Z. (Raymond Zinke) Gallun

4.6
Cover of The Space Pioneers

The Space Pioneers

Carey Rockwell

3.1
Cover of Danger in Deep Space

Danger in Deep Space

Carey Rockwell

3.5
Cover of Stand by for Mars!

Stand by for Mars!

Carey Rockwell

3.8
Cover of Treachery in Outer Space

Treachery in Outer Space

Carey Rockwell

4.4
Cover of Satellite Passage

Satellite Passage

Theodore L. Thomas

3.3
Cover of Men into space

Men into space

Murray Leinster

2.2