Principles of Railroad Transportation, by Emory R. Johnson ... and Thurman W. Van Metre ... Illustrated with Half-tones, Maps and Diagrams.Emory Johnson1921
The Panama Canal, Comprising Its History and Construction, and Its Relation to the Navy, International Law and Commerce, by Reuben E. Bakenhus... Harry S. Knapp... Emory R. Johnson...R. E. Bakenhus1915