Friedman, Ralph (January 1, 1990). In Search of Western Oregon. Caxton Press. p. 259. ISBN9780870043321. Archived from the original on October 11, 2013. Retrieved August 25, 2013. Note: Distributed by the University of Nebraska Press for Caxton Press.
Cook, Sybilla Avery (April 2, 2013). Walking Portland, Oregon (2 ed.). Globe Pequot Press. p. 33. ISBN9780762778065. Archived from the original on January 1, 2014. Retrieved August 27, 2013. Note: Walk 2: Civic Center / Urban Renewal.
Friedman, Ralph (January 1, 1990). In Search of Western Oregon. Caxton Press. p. 259. ISBN9780870043321. Archived from the original on October 11, 2013. Retrieved August 25, 2013. Note: Distributed by the University of Nebraska Press for Caxton Press.
Cook, Sybilla Avery (April 2, 2013). Walking Portland, Oregon (2 ed.). Globe Pequot Press. p. 33. ISBN9780762778065. Archived from the original on January 1, 2014. Retrieved August 27, 2013. Note: Walk 2: Civic Center / Urban Renewal.