"Twin Bridges," John Day RiverClarence E. Mershon. The Columbia River Highway: From the Sea to the Wheat Fields of Eastern Oregon. Portland: Guardian Peaks Enterprises. 2006. 1st Edition. 238.
"Also visible in this photo are the Twin Bridge Camp Square Deal Store, the Red Crown Gasoline station and a Garage."
Porter's Business ComplexClarence E. Mershon. The Columbia River Highway: From the Sea to the Wheat Fields of Eastern Oregon. Portland: Guardian Peaks Enterprises. 2006. 1st Edition. 238.