Columbia subject headings:
American literature--20th century--History and criticism.
Astronautics in literature.
Astronauts in literature.
Earth (Planet)--In literature.
Outer space--Exploration--United States--History.
Space flight in literature.
Space in literature.
Harvard subject headings:
American literature--20th century--History and criticism
Astronautics in literature.
Astronauts in literature.
Earth in literature.
Outer space in literature.
Outer space--Exploration--United States--History.
Space flight in literature.
Princeton subject headings:
American literature--20th century--History and criticism.
Astronautics in literature.
Astronauts in literature.
Earth in literature.
Outer space in literature.
Outer space--Exploration--United States--History.
Space flight in literature.