1. eSkeptic article on Psychic Methods: http://www.skeptic.com/eskeptic/13-11-06/
2. eSkeptic Newsletter and and archive: http://www.skeptic.com/eskeptic/13-12-11/
3. Bigfoot Field Researchers Organization (BFRO) has map of 3,313 siting in North America, 1921-2012, prep by Joshua Stevens, doctoral candidate, Penn State Univ.; ref World Explorer vol 6, no 8 (Dec, 2013), pp14-15;