Fantastic Universe, August 1956 (Volume 6, No. 1)

CONTENTS: So Bright the Vision [Clifford D. Simak]; . Attack From Within [Burton Crane]; . The Robot Carpenter [F. B. Bryning]; . Fair Exchange [Mack Reynolds]; . The Far-off Stars [Ruth Sterling]; . The Only Conqueror [Norman Arkawy]; . Room For Improvement [Mann Rubin]; . Hail To the King [Edward Ludwig]; . The Voiceless Sentinels [Roger Dee]; . The Macauley Circuit [Robert Silverberg]