On-sale date from copyright registration.
in Supermann (Serieforlaget / Se-Bladene / Stabenfeldt, 1966 series) #10/1966 ([oktober] 1966) [ Clark Kent!]
in Superman (Interpresse, 1965 series) #12 (décembre 1966) [moins 2,67 pages [minus 2.67 pages]]
in Superman (Egmont Ehapa, 1966 series) #12/1967 (17. Juni 1967)
in Superman Annual (Atlas Publishing, 1951 series) #1968 (1968)
in Superman (Interpresse, 1965 series) #3 (décembre 1965) [noir et blanc [black and white]]
in Supermann (Serieforlaget / Se-Bladene / Stabenfeldt, 1966 series) #11/1966 ([november] 1966)On the page between page 6 and page 7 of the previous story sequence.
Letters from Robert F. Kennedy, Jr. (nephew of JFK), Paul Shelburne, Doug Henderson, Vicki Darby, Billy Duffer, Jonathan Klein, Christopher Kearn, Victor Zeni, Rose Fox, and Douglas Freeman.
| Script: | Henry Boltinoff (signed) |
| Pencils: | Henry Boltinoff (signed) |
| Inks: | Henry Boltinoff (signed) |
| Colors: | ? |
| Letters: | ? |
Art credits by Bob Bailey. Art previously credited to John Forte.