Sources
Although sources on this subject are rather scarce, I relied on a few very thorough books and some interesting websites to get me started. The following sources were particularily helpful:
The History Channel Special on Crop Circles inspired this site.
Circular Evidence, by Pat Delgado and Colin Andrews.
Secrets in the Fields, by Freddy Silva
Aliens.Monstrous.com provided a fair and simple overview for the project.
Gerald Hawkins has already done significant work relating crop circles to music. For the most part, I chose note to report his findings. Rather, I reported what I sensed he did not cover.