▲Título▼ | ▲C▼ | ▲Año▽ | ▲V▼ | ▲Concepto▼ |
---|---|---|---|---|
Miskatonic University Graduate Kit (junto a Lisa A. Free, Ron Leming, Sandy Petersen et al.) | ![]() ![]() | 1987 | — | Escritor |
Introduction (to "Cthulhu Companion") (junto a Sandy Petersen) | ![]() ![]() | 1983 | — | Escritor |
Sourcebook for the 1920s (junto a Tadashi Ehara, Harry Henderson, Steve Perrin et al.) | ![]() ![]() | 1981 | — | Escritor |
Eastern U.S. Rail Lines, 1920s | ![]() ![]() | 1981 | — | Escritor |
Call of Cthulhu World Map (Foldout) (junto a Lynn Willis) | ![]() ![]() | 1981 | — | Escritor |