Bert Janssen
Reparto
Reparto
- 2014A Field Full of SecretsSelf
- 2009New Swirled OrderSelf - Crop Circle Researcher
- 2008The Wake Up Call: Anybody Listening?
- 2005Crossovers from Another Dimension...Self
- 2005De wereld draait doorSelf
- 2002Crop Circles: Quest for TruthSelf - Author & Researcher