Erik March Zissu 
Blood Matters [EPUB ebook] 
Five Civilized Tribes and the Search of Unity in the 20th Century

First Published in 2002. This study explores how the five tribes of Oklahoma — Cherokees, Chickasaws, Choctaws, Creeks, and Seminoles — strove to achieve political unity within their tribes during the first decades of the 20th century by forging a new sense of peoplehood around the idea of blood.