Chaput, Donald «Generals, Indian Agents, Politicians: The Doolittle Survey of 1865». Western Historical Quarterly, 3, 3, 7-1972, pàg. 269. DOI: 10.2307/967424. JSTOR: 967424.
Unrau, William E. «The Civilian as Indian Agent: Villain or Victim?». Western Historical Quarterly, 3, 4, 10-1972, pàg. 405–420. DOI: 10.2307/966865. JSTOR: 966865.
jstor.org
Chaput, Donald «Generals, Indian Agents, Politicians: The Doolittle Survey of 1865». Western Historical Quarterly, 3, 3, 7-1972, pàg. 269. DOI: 10.2307/967424. JSTOR: 967424.
Unrau, William E. «The Civilian as Indian Agent: Villain or Victim?». Western Historical Quarterly, 3, 4, 10-1972, pàg. 405–420. DOI: 10.2307/966865. JSTOR: 966865.