Burr, George L., History of Hamilton and Clay Counties, Nebraska, Volume 1, S.J. Clarke Publishing Company, , 123 p. (lire en ligne).
J. R. Bowman, The Pacific tourist. J.R. Bowman's illustrated transcontinental guide of travel from the Atlantic to the Pacific Ocean, New York, J.R. Bowman, (OCLC752667534, lire en ligne), p. 59
J. R. Bowman, The Pacific tourist. J.R. Bowman's illustrated transcontinental guide of travel from the Atlantic to the Pacific Ocean, New York, J.R. Bowman, (OCLC752667534, lire en ligne), p. 59