Gemstone Publishing · Lambert Gann Pub
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Astro Cycles and Speculative Markets | 978-0-939093-11-3 (0-939093-11-1) | 1985 | |
| Uncle Scrooge #362 | 978-1-888472-59-2 (1-888472-59-6) | 2007 | Don Rosa · Pat McGreal · Carol McGreal · C. Spencer |