Issue: #283 MJ
Cover by Nick Cardy."Superman's Mystery Masquerade!" written by Cary Bates, penciled by Curt Swan and inked by Bob Oksner. (Superman vs Dr. Vandt, with Lois Lane)"One of Our Imps is Missing!" written by Elliot S. Maggin, penciled by Curt Swan and inked by Bob Oksner. (Superman vs Mr. Mxyzptlk)"Another job well done by Superman! Now to resume my identity as... Chris Delbart-- the Wolf of Wall Stree...
First appearances: Dr. Vandt, Officer Grflznk
Creators: Elliot S! Maggin, Julius Schwartz, Cary Bates, Curt Swan, Bob Oksner, Nick Cardy, E. Nelson Bridwell
Characters: Superman, Lois Lane, Mr. Mxyzptlk, Abraham Lincoln, George Washington, Dr. Vandt, Daniel Webster, Officer Grflznk