Joel Hagen
Source: "Joel Hagen Bibliography." Author Wars, https://authorwars.com/authors/joel-hagen.html".
Titles:
Essays
Interior Art
- Unknown. Journey to Rilla
- Unknown. Sunrise on Pluto
- Unknown. The Cosmic Bomber
- Unknown. Visual Data: Technical Illustrations
- Unknown. Xenopaleontology
- 1981. Joel Hagen