My Sources for Paper

1) Eltjo H. Haselhoff The Deepening Complexity of Crop Circles: Scientific Research & Urban Legends. Frog, Ltd. 2001. Chapter 1
http://books.google.com/books?hl=en&lr=&id=rBgiEpB0RkcC&oi=fnd&pg=PR15&dq=crop+circles&ots=6Alz2tEIp6&sig=SholU_m2GNuAHzh_IlHoFPYLP-0#PPA16,M1

2) Joe Nickell "Crop circle mania wanes: an investigative update". Skeptical Inquirer. May-June 1995. FindArticles.com. 01 Oct. 2007. http://findarticles.com/p/articles/mi_m2843/is_n3_v19/ai_16836665

3) Joe Nickell “Circular reasoning: The 'mystery' of crop circles and their 'orbs' of light - Special Report". Skeptical Inquirer. Sept-Oct 2002. FindArticles.com. 01 Oct. 2007. http://findarticles.com/p/articles/mi_m2843/is_5_26/ai_91236221