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 John Pierce; Mark Patrican; Mark Porter; Jason Wight, Jr.; Ignacio Arroyo; L.L. Simpson
Lundgren pseudonym noted by Jerry Bails' Who's Who of American Comic Books.
house ad for Adventures into the Unknown (American Comics Group, 1948 series), featuring Nemesis, and Herbie (American Comics Group, 1964 series)