Derby, E. H. (1869). The overland route to the Pacific: A report on the condition, capacity and resources of the Union Pacific and Central Pacific railways. Lee & Shepard.

Derby, E. H. The Overland Route to the Pacific: A Report on the Condition, Capacity and Resources of the Union Pacific and Central Pacific Railways. Boston: Lee & Shepard, 1869.

Derby, E. H. The Overland Route to the Pacific: A Report on the Condition, Capacity and Resources of the Union Pacific and Central Pacific Railways. Lee & Shepard, 1869.