Yellow Bird: The Saga of George Armstrong Custer's Daughter?

I am writing my Midterm on Yellow Bird though I can not find anything on her. Does anyone know any books that speak of her? Real Facts? Did Custer have a child by an Indian woman? A question so commonly asked, but not quite so easily answered. That he noticed an Indian women, Cheyenne women in particular is undeniable. The story of the child originates from his relationship with Me-o-tzi, daughter of Chief Little Rock with whom he unwittingly went through a strange form of marriage. Even more strange in that his men had just killed her father! They lived together throughout the winter of 1868-69. Meotzi had two children from the “marriage.” Following the ensuing gossip, Libbie visited and saw the first child, “and saw no resemblance to her husband.” The second child was undeniably his, with creamy skin and yellow streaks in its hair who was named “Yellow Bird.” Many of his officers, including his brother Tom, had spoken openly of witnessing Custer fornicating with Meotzi. Captain Benteen and others spoke of Custer inviting officers, desirous of availing themselves of the services of a captured squaw, to come to the squaw round-up corral and select one. Custer always had first choice.