Publicado por Galaxy Publishing Corporation, 1966
Librería: THE FINE BOOKS COMPANY / A.B.A.A / 1979, ROCHESTER, MI, Estados Unidos de America
Original o primera edición
First Edition. WORLDS OF TOMORROW, Galaxy Publishing Corporation, August, 1966 & May, 1967, first editions, Volume 4, #1 & #4, both near fine in full color pictorial wraps. Contains original contributions by Fred Pohl, Sam Moskowitz, Robert Ettinger, Victor Borge, Jack Gaughan, Mack Reynolds, David Kyle, Richard Wilson, Vaughn Bode, et.al.