F. Pohl - C. M. Kornbluth: A Venus-üzlet. Kossuth Könyvkiadó, 1971. Illusztrációk: Kass János.

Frederik Pohl and C. M. Kornbluth: The Space Merchants. Penguin Books. Cover of the Hungarian edition. Illustrations: Janos Kass.

F. Pohl - C. M. Kornbluth: A Venus-üzlet. Kossuth Könyvkiadó, 1971. Borító: Kass János.
Frederik Pohl and C. M. Kornbluth: The Space Merchants. Penguin Books. Cover of the Hungarian edition. Cover artwork: Janos Kass.

F. Pohl - C. M. Kornbluth: A Venus-üzlet. Kossuth Könyvkiadó, 1971. Borító: Kass János.

Frederik Pohl and C. M. Kornbluth: The Space Merchants. Penguin Books. Cover of the Hungarian edition. Cover artwork: Janos Kass.

Berkes Péter: Égi utazók. Móra Ferenc Ifjúsági Könyvkiadó, Budapest, 1983. Borító: Varga Pál.
Heavenly Travelers by Peter Berkes. Hungarian youth book, 1983. Cover artwork: Pal Varga.

Berkes Péter: Égi utazók. Móra Ferenc Ifjúsági Könyvkiadó, Budapest, 1983. Borító: Varga Pál.

Heavenly Travelers by Peter Berkes. Hungarian youth book, 1983. Cover artwork: Pal Varga.

Lester Del Rey: A szökevény robot. Móra Ferenc Könyvkiadó, Budapest, 1977. Illusztrátor: Ábrahám Rafael.

The Runaway Robot by Lester Del Rey.  Scholastic Book Services, 1966. Illustrated By Wayne Blickenstaff.

Isaac Asimov: Es, Robots [I Robot]. Riga, Izdevnieciba, 1967. First Latvian edition.
via ha.com

Isaac Asimov: Es, Robots [I Robot]. Riga, Izdevnieciba, 1967. First Latvian edition.

via ha.com

X-15 Research Results by Wendell H. Stillwell. NASA, 1965, Washington D.C.
via NASA History Series Publications e-books

X-15 Research Results by Wendell H. Stillwell. NASA, 1965, Washington D.C.

via NASA History Series Publications e-books

Nagy Ernő: Rakétajárművek. Táncsics Könyvkiadó, Budapest, 1968. Hungarian book, hardcover, supersonic passenger airliner concept by Edward Henry Heinemann.
three more similar book covers here

Nagy Ernő: Rakétajárművek. Táncsics Könyvkiadó, Budapest, 1968. Hungarian book, hardcover, supersonic passenger airliner concept by Edward Henry Heinemann.

three more similar book covers here

Robert Moore Williams: Conguest Of The Space Sea. Ace, New York, 1955. Artist: Ed Valigursky (profile at Pulpartists).

Robert Moore Williams: Conguest Of The Space Sea. Ace, New York, 1955. Artist: Ed Valigursky (profile at Pulpartists).

Lee Correy (aka G. Harry Stine, rocket engineer): Contraband Rocket. Ace Books, New York, 1956. Artist: Ed Valigursky (profile at Pulpartists).

Lee Correy (aka G. Harry Stine, rocket engineer): Contraband Rocket. Ace Books, New York, 1956. Artist: Ed Valigursky (profile at Pulpartists).

1# Leigh Brackett: The Galactic Breed (The Starmen). Ace Books, New York, 1952. Artist unknown, possibly Ed Emshwiller.

2# Original artwork via ha.com (note the “Emsh” signo on the back)