Located on the inside front cover. Published in cooperation with the National Social Welfare Assembly.
in The Best of DC (DC, 1979 series) #57 (February 1985), #57 (February 1985)
in The Legion of Super-Heroes Archives (DC, 1991 series) #3 (1993), #3 (1993)
in Showcase Presents: Legion of Super-Heroes (DC, 2007 series) #2 (2008)
from Showcase (DC, 1956 series) #26 (May-June 1960)Title, first line and reprint data from Arthur Lortie, added August 2006.
in Legion of Super-Heroes (DC, 1973 series) #1 (February 1973) [first half]
in The Legion of Super-Heroes Archives (DC, 1991 series) #3 (1993)
from Superboy (DC, 1949 series) #72 (April 1959)