On-sale date given in Superboy (DC, 1949 series) #124 and copyright registration.
Letters from George L. Bixler, Linda Rosen, David Broomhead, Tim Everly, Pat Gaskell, Joyce Mathau, Greg Sanchez, Murt Thompson, Jr., Edward Wachtel.
A Hall of Fame Classic. Script credit by Martin O'Hearn.
Snippets of letters from numerous readers.