Rhode, Dale (November 2007). "Biggs Picture Jasper: A Legacy is Born"(PDF). Northwest Newsletter. 47 (4). Northwest Federation of Mineralogical Societies: 11. Archived from the original(PDF) on November 4, 2010. Retrieved February 14, 2011.
Rhode, Dale (November 2007). "Biggs Picture Jasper: A Legacy is Born"(PDF). Northwest Newsletter. 47 (4). Northwest Federation of Mineralogical Societies: 11. Archived from the original(PDF) on November 4, 2010. Retrieved February 14, 2011.