in Superman Archives (DC, 1989 series) #8 ([October] 2010)Verified by Jack Burnley.
in Superman Archives (DC, 1989 series) #8 ([October] 2010)Writer identification by Martin O'Hearn, inker identification by Bob Hughes (December, 2004).
in Superman's Girl Friend, Lois Lane (DC, 1958 series) #122 (May 1972)
in Superman Archives (DC, 1989 series) #8 ([October] 2010)Writer identification by Martin O'Hearn, inker identification by Bob Hughes (December, 2004).
in Superman Archives (DC, 1989 series) #8 ([October] 2010)Writer credit by Martin O'Hearn, inker credit by Bob Hughes (December, 2004).
in 80 Page Giant (DC, 1964 series) #G18 (January 1966)
in Superman (DC, 1939 series) #183 (January 1966) [Note the spelling]
in Superman from the Thirties to the Seventies (Crown Publishers, 1971 series) #[nn] (1971)
in Superman from the Thirties to the Eighties (Crown Publishers, 1983 series) #[nn] (1983)
in The Greatest Superman Stories Ever Told (DC, 1987 series) #[nn] ([November] 1987)
in The Greatest Superman Stories Ever Told (DC, 1989 series) #1 ([April] 1989)
in Superman Archives (DC, 1989 series) #8 ([October] 2010)Mxyztplk is pronounced "Mix-yizt-pulk" according to Alvin Schwartz. Name was changed to Mxyzptlk in 1958. Writer credit claimed by Jerry Siegel in a letter to Richard Morrissey that states this story was written prior to earlier printed newspaper sequence by Whitney Ellsworth and Wayne Boring. "I thought I was the only one who could fly!"
Art verified by Craig Delich 2011-3-5.