- Skeptical Inquirer Vol 16#2 Crop Cirlces, Hype, Hoaxes, & Hoopla
- Crop Circles and the Mistresses of the Martian Pyramids : England's Crop Circle Connection to Egypt's Giza Plateau and the Mars Cydonia Region by Steve Canada, 2000-09
- Alchemy of Nine Dimensions: Decoding the Vertical Axis, Crop Circles, and the Mayan Calendar by Barbara Hand Clow, Gerry Clow, 2004-09-01
- UFO USA: A Traveler's Guide to UFO Sightings, Abduction, Sights, Crop Circles, and Other Unexplained Phenomenones (Travel Guide) by Society Presv Alien Contact, 1999-05-26
- Round in Circles: Poltergeists, Pranksters, and the Secret History of the Cropwatchers by Jim Schnabel, 1994-09
- Crop Circles by Nicolas Montigiani, 2003-02
- Crop Circle Revealed: Language of the Light Symbols by Judith; Lamb, Barbara Moore, 2001
- Crop Circles - The Theory That Works: Outline of Author's Original, Verifiable Translation Method by Steve Canada, 1997-12
- The Sphinx and Mars Face Identified: Crop Circle Analysis Leads to New Findings by Steve Canada, 1994-03
- Ufos, Crop Circles and Mars Structures-Their Common Origin: Crop Circle Symbols Link These 3 Phenomena Together by Steve Canada, 1993-06
- Crop Circle Meanings - Understanding the Symbols : The Returning Goddess and Coming Transformations by Steve Canada, 1995-04
- Crop Circles and Quantum Physics: Hydrogen Atom Electron States by Steve Canada, 1993-02
- Crop circles of Anunnaki from Nibiru-- Egyptian gods returning by Steve Canada, 2002
- Crop Circle Origins: Ancient Symbols Used Reveal Where Circlemakers Are from by Steve Canada, 1993-07
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