Steel City Tales

David Clarke and Rob Wilson. Strange Sheffield, Legends, Folklore and Mysteries of Hallamshire. ASSAP, 1987.

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Earth Mysteries

    Paul Deveraux. Secrets of Ancient and Sacred Places. Blandford, 1995.
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Spooklights

David Clarke, and Granville Oldroyd. Spooklights: A British Survey. Privately published by the authors, 1986.

Earthlights Revisited

Paul Devereux, Earth Lights Revelation; UFOs and mystery light form phenomena. Blandford, 1989.

Earth Lights

Paul Devereux. Earth Lights: Towards an Explanation of the UFO Enigma. Turnstone Press, 1982.