Even though the Who's Who doesn't list Gustavson as a writer of the strip, Mike Kooiman and Jim Amash state in the Quality Companion that he created the strip and wrote it, so the script credit has been added by Craig Delich 2013-1-18. Also verified by Gustavson's son, Terry Gustafson.
Letterer credit courtesy of Terry Gustafson, Paul Gustavson's son.
Writer credit revised from "Joe Devlin" (presumably a typo for "John Devlin") to ? by Craig Delich 2013-4-6. The Who's Who does not indicate a writing credit for John Devlin on this strip. Writer credit updated to "Bernard Dibble?" Artist correction from John Devlin to Bernard Dibble, who took over this strip in 1943 from John Devlin.
In the very first Dewey Drip strip (Police Comics (1941 series) #1 August 1941), Dewey received his draft notice. The story in #56 is the last one in which he appears in Army uniform.
Credits from Martin O'Hearn at http://martinohearn.blogspot.com/ ; art formerly attributed to Al Bryant.
Dick Mace text story.