"Cover is a composite of separate figures done for Superboy and the Legion of Super-Heroes (DC, 1977 series) #231 (September 1977)"
"Illustrated with a detail from Superboy (DC, 1949 series) #224 (February 1977)."
"Illustrated with a detail from Superboy (DC, 1949 series) #228 (June 1977)."
"Illustrated with a detail from Superboy and the Legion of Super-Heroes (DC, 1977 series) #231 (September 1977)"