Chastaina, Matthew L.؛ Deymier-Black, Alix C.؛ Kelly, John E.؛ Brown, James A.؛ Dunand,David C. (يوليو 2011). "Metallurgical analysis of copper artifacts from Cahokia". Journal of Archaeological Science. ج. 38 ع. 7: 1727–1736. مؤرشف من الأصل في 2015-09-24.
Chastaina, Matthew L.؛ Deymier-Black, Alix C.؛ Kelly, John E.؛ Brown, James A.؛ Dunand,David C. (يوليو 2011). "Metallurgical analysis of copper artifacts from Cahokia". Journal of Archaeological Science. ج. 38 ع. 7: 1727–1736. مؤرشف من الأصل في 2015-09-24.