Series Authors: David Hagberg
| # 6 Citadels on Earth (©1981) | |
| Author(s): David Hagberg
Comment: out of print | |
| # 4 Forces From the Federation (©1981) | |
| Author(s): David Hagberg
Comment: out of print | |
| # 3 Flash Gordon, Flash Gordon | |
| Author(s): David Hagberg
Comment: out of print | |
| # 2 War of the Citadels (©1980) | |
| Author(s): David Hagberg
Comment: out of print | |
| # 1 Massacre in the Twenty-Second Century (©1980) | |
| Author(s): David Hagberg
Comment: out of print | |
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