MARTIAN MARTYRS; VALLEY OF PRETENDERS; THE MACHINE THAT THOUGHT; THE NEW LIFE; THE VOICE COMMANDS; RHYTHM RIDES THE ROCKET.
New York: Columbia Publications, Inc, 1942. First edition. Paperback. Sm. Octavo. Each 24pp, including cover. Pictorial white paper wrappers with illustration of a rocket by Frank R. Paul, printed in black. On faint dent on edge of one cover.
