Researchers

Circular Site - Dutch researcher Janet Ossebaard's site about crop circles, balls of light and anomalies.
http://www.circularsite.com/

Circles Phenomenon Research International - Founded by Colin Andrews. An international crop circle research organization with offices in UK, USA, Canada, Australia and Japan.
http://cropcircleconnector.com/CPRI/cpri96.html

Frank Laumen - Home of the German crop circle researcher and photographer.
http://www.franklaumen.de/

CropCircleAnswers.com - Home of researchers Ed and Kris Sherwood. Includes extensive crop circle 'luminosity' research and photographic evidence of anomalous 'balls of light'.
http://www.cropcircleanswers.com/

Judith Moore's Crop Circles Revealed - Judith Moore has been researching crop circles for many years and has co-authored "Crop Circles Revealed." She channels information about the crop circles.
http://www.cropcirclesrevealed.com/

BLT Research - The BLT Research Team Inc.'s primary goal is the discovery and scientific documentation of physical changes induced in plants, soils and other materials at crop circle sites.
http://www.bltresearch.com/

The Crop Circular - The regularly updated crop circles site of researcher/lecturer Freddy Silva, offering factual research dedicated to the appreciation and understanding of crop circles, the most dynamic form of multi-dimensional communication to appear in our history.
http://home.clara.net/lovely/homepg.html

Star Nation Gallery - Researcher Rod Bearcloud Berry's site contains articles and a crop circle gallery.
http://www.starnationgallery.com/

Janet Ossebbard and Bert Janssen - Articles about crop circle geometry and information about their videos.
http://www.cropcircleconnector.com/Bert/bert&janet.html

Lucy Pringle - Excellent pictures taken since 1996 by Lucy Pringle, articles, you can order cards, prints, books, calendars and other related merchandises.
http://home.clara.net/lucypringle/

Bert Janssen - Articles, films and photos from Netherlands based researcher Bert Janssen. His thoughts and articles on crop circles. His encounters with light anomalies and his work on ancient sites.
http://www.bertjanssen.nl/

Peter Sorensen - Peter R. Sorensen is a researcher who has videotaped more crop circles than anyone else in the last eight years; pages also include portraits of many crop circle researchers, centuries-old Circle Graffiti in Winchester Cathedral, articles.
http://cropcircleconnector.com/Sorensen/PeterSorensen99.html

Busty Taylor crop circle page. - Crop circle research and photography.
http://www.busty-taylor.com/cropper/98busty2.htm

Earth Files - Real X-Files - Linda Moulton Howe's site has many excellent articles on crop circles.
http://www.earthfiles.com