Serpents of Fire: German Secret Weapons, UFOs and the Hitler/Hollow Earth Connection by Gray Barker
Serpents of Fire: German Secret Weapons, UFOs and the Hitler/Hollow Earth Connection
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Gray Barker
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Serpents of Fire: German Secret Weapons, UFOs and the Hitler/Hollow Earth Connection

Gray Barker with Michael X. Barton, Ruth Leedy, Andrew Colvin

128 pages • first pub 2014 (view editions)

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