Crowe, Rebekah (Winter 2014). "A Madman and a Visionary: George Francis Train, Speculation, and the Territorial Development of the Great Plains". Great Plains Quarterly. 34 (1): 41. doi:10.1353/gpq.2014.0003. S2CID162194831.
Crowe, Rebekah (Winter 2014). "A Madman and a Visionary: George Francis Train, Speculation, and the Territorial Development of the Great Plains". Great Plains Quarterly. 34 (1): 41. doi:10.1353/gpq.2014.0003. S2CID162194831.