"Commercial routes from 1792 to 1843 by sea and overland" / Oscar O. Winther; Oregon Historical Quarterly, vol. 42, pp. 230-246
"The Development of transportation in Oregon, 1843-49" / Oscar O. Winther; Oregon Historical Quarterly, vol. 40, pp. 315-325
"The California and Oregon Trail, 1849-1860" / Amos W. Hartman; Oregon Historical Quarterly, vol. 25, pp. 1-35
"California state company in Oregon" / Oscar O. Winther; Oregon Historical Quarterly, vol. 35, pp. 131-138
"Abbot railroad surveys, 1855" / Robert W. Sawyer; Oregon Historical Quarterly, vol. 33, pp. 1-24, 115-135
"The History of the Oregon and California Railroad" / John T. Ganoe; Oregon Historical Quarterly, vol. 25, pp. 236-283, 330-352
"C. & O.C.: the long life of a short line" / Marjorie N. Helms; Call Number, vol. 20, no. 1, pp. 12-17
"Recent history of Oregon's electric interurbans" / R.V. Mills; Oregon Historical Quarterly, vol. 46, pp. 114-115.
