Patrick N. Wyse Jackson, 2005 Thomas Oldham. Earth Sciences 2000 Issue 12 "Archived copy"(PDF). Archived from the original(PDF) on 15 March 2012. Retrieved 19 October 2012.{{cite web}}: CS1 maint: archived copy as title (link)
Patrick N. Wyse Jackson, 2005 Thomas Oldham. Earth Sciences 2000 Issue 12 "Archived copy"(PDF). Archived from the original(PDF) on 15 March 2012. Retrieved 19 October 2012.{{cite web}}: CS1 maint: archived copy as title (link)