John Butterfield
Contributing Artist 3
 | Analog Science Fiction/Science Fact (January 1979) | Magazine |
 | Analog Science Fiction/Science Fact (February 1979) | Magazine |
 | Analog Science Fiction/Science Fact (March 1979) | Magazine |
Copyright Holder (Text) 3
 | La vengeance d'Althéos | Mass-Market Paperback |
 | L'odyssée d'Althéos | Mass-Market Paperback |
 | Le labyrinthe du roi Minos | Mass-Market Paperback |