The Other Slavery: The Uncovered Story of Indian Enslavement in America by 
Cochise: Firsthand Accounts of the Chiricahua Apache Chief by 
Shamans, Healers, and Medicine Men by 
Indians: the great photographs that reveal North American Indian life, 1847-1929 by 
Voices of the American West: The Indian Interviews 1901 - 1919 by 
Great Speeches by Native Americans by 
An Indigenous Peoples' History of the United States by Interlibrary Loan is a free service that allows you to request materials to be delivered to your campus library. There are two options for requesting materials: requesting an item directly from one of the Library Catalogs or using Interlibrary Loan Request form.
Be prepared to wait at least several days for an article and at least a week for a book.
National Archives Native American Pages:
http://www.archives.gov/research/alic/reference/native-americans.html#other
American Memory Project from the Library of Congress:
http://memory.loc.gov/ammem/index.html
U.C. Berkeley, Ethnic Studies Library, Native American Studies Collection:
http://eslibrary.berkeley.edu/NASsites/native-american-studies-online-source-guide
Primary source accounts of important historic Western History events:
http://eyewitnesstohistory.com/owfrm.htm
Chronicling America: Historic American Newspapers from 1836 - 1922:
https://chroniclingamerica.loc.gov/
Colorado State Historical Newspaper Collection:
http://www.coloradohistoricnewspapers.org/
The "google" of government documents:
Google Scholar:
