According to Schaffenberger in a 1998 letter, many covers at ACG were penciled and inked by him, but signed by Pete Costanza because DC editor Mort Weisinger (for whom Schaffenberger worked on the Superman Family titles at that time) did not want him drawing superhero covers for other companies.
Letters submitted by Nicholos Peter Debelo, Corby Sanders, John Harwood, Bette Goodwin, and Walter Smith.