Contents (view Concise Listing)

• 4 •
  Si usted fuera un copín^?Si usted fuera un copin
  • novelette by Murray Leinster (trans. of If You Was a Moklin 1951)
• 4 •  Si usted fuera un copín • interior artwork by Rosenbaum
• 22 •
  Prisma de la sabiduría^?Prisma de la sabiduria
  • short story by James Causey (trans. of Teething Ring)
• 22 •  Prisma de la sabiduría • interior artwork by Dick Francis
• 29 • Venus y Marte, los hermanos de la Tierra • [The Conquest of Space] • essay by Chesley Bonestell and Willy Ley (trans. of The Conquest of Space (Part 5 of 9))
• 29 •  Venus y Marte, los hermanos de la Tierra • interior artwork by Chesley Bonestell
• 46 • De cabo a rabo • novelette by John Wyndham (trans. of Pillar to Post 1951)
• 46 •  De cabo a rabo • interior artwork by Poers
• 70 •
  Héroe imprevisto^?Heroe imprevisto
  • novelette by Isaac Asimov (trans. of The C-Chute 1951)
• 70 •  Héroe imprevisto • interior artwork by David Stone
• 106 •
  El extraño caso de la nueva Babel^?El extrano caso de la nueva Babel
  • short story by Murray Leinster (trans. of The Strange Case of John Kingman 1948)
• 106 •  El extraño caso de la nueva Babel • interior artwork by Junin
• 116 • La esponja insaciable • short story by Winston K. Marks (trans. of The Water Eater)
• 116 •  La esponja insaciable • interior artwork by Balbalis
• 128 • Espionaje • novelette by Eric Frank Russell (trans. of I, Spy! 1940)
• 128 •  Espionaje • interior artwork by Csecs [as by Hugo Csecs]
• 136 •
  Huéspedes^?Huespedes
  • novelette by Isaac Asimov (trans. of Hostess 1951)
• 136 •  Huéspedes • interior artwork by Ed Emshwiller [as by Emsh]