Copyright 1963 by National Periodical Publications, Inc.
in The Legion of Super-Heroes Archives (DC, 1991 series) #2 (1992), #2 (1992)
in Showcase Presents: Legion of Super-Heroes (DC, 2007 series) #1 ([April] 2007)Printed in black-and-white on inside front cover.
in Super Heroes Album (K. G. Murray, 1976 series) #13 ([Circa 1978-1980])
in Adventure Comics (DC, 1938 series) #502 (August 1983)
in The Legion of Super-Heroes Archives (DC, 1991 series) #2 (1992)
in Showcase Presents: Legion of Super-Heroes (DC, 2007 series) #1 ([April] 2007)Letters from readers - Christy Ortega, Charles Massoglia, Lon Mitchell, Barney Palmatier, L. Taylor, Robert Block and Lynn Thompson.
in Super Heroes Album (K. G. Murray, 1976 series) #13 ([Circa 1978-1980])
in Adventure Comics (DC, 1938 series) #502 (August 1983)
in The Legion of Super-Heroes Archives (DC, 1991 series) #2 (1992)
in Showcase Presents: Legion of Super-Heroes (DC, 2007 series) #1 ([April] 2007)
from Superman Annual (DC, 1960 series) #4 (1961) [pages 1 and 2 with alterations]
in Adventure Comics (DC, 1938 series) #365 (February 1968) [pp. 3-4, with alterations]
in The Legion of Super-Heroes Archives (DC, 1991 series) #5 (1994)
in Showcase Presents: Legion of Super-Heroes (DC, 2007 series) #2 (2008)
in The Best of DC (DC, 1979 series) #57 (February 1985)
in The Legion of Super-Heroes Archives (DC, 1991 series) #2 (1992)
in Showcase Presents: Legion of Super-Heroes (DC, 2007 series) #1 ([April] 2007)The first two pages are reprinted, but the last two pages are new.
in The Legion of Super-Heroes Archives (DC, 1991 series) #2 (1992) [reformatted]