Betty Mercer lettering credits in this issue based on "The War Years: Anglo-American Publishing Ltd" by Robert MacMillan in Canuck Comics (1986).
Appears to be the first Sooper Dooper strip, since Sooper hasn't met the Editor at the beginning of the strip.
Les Gilpin credit based on comparison of artwork with Sooper Dooper strips in this issue.
Inside back cover.
Back cover.