Links to information about Crop Circles:
http://www.answers.com/topic/crop-circles
http://en.wikipedia.org/wiki/Crop_Circles
http://www.occultopedia.com/c/crop_circles.htm
Websites, Major Crop Circle Websites:
1. Crop Circle Connector: http://www.cropcircleconnector.com/anasazi/cropcircleresearch.html
2. Links to many crop circle web pages from Crop Circle Connector: http://www.cropcircleconnector.com/anasazi/third.html
Bibliographies:
1. Crop Circle Connector Bibliography: http://www.cropcircleconnector.com/anasazi/morebooks.html