Rockets, Missiles & Space Travel

1953

Astounding Science-Fiction, March 1939

1939

A través del espejo

2016

The Year's Greatest Science-Fiction and Fantasy 3rd Annual Volume

1958

Astounding Science-Fiction, December 1940

1940

Astounding Science-Fiction, October 1942

1942

Dragons in Amber

Further Adventures of a Romantic Naturalist

1951

Exotic Zoology

1959

The Lungfish, the Dodo, and the Unicorn

An Excursion into Romantic Zoology

1941

The Conquest of Space

1949

Engineers' Dreams

1954

The Poles

1962

Dawn of Zoology

1968