This issue has variants.
On-sale date from DC Releases #20. World's Finest Comics ends its 45 year run.
Superman and Batman agree to split up their partnership in this last issue.
Farewell paragraph and letters of comment from Patrick Corcoran, Bill Climer, David Molina and David Pulleyblank. Second page contains house advertisement for Justice Society of America and 'Mazing Man (about two-thirds of the page).