The evolution of the unit train, 1960-1969 /
John T. Starr, Jr.
- Chicago : University of Chicago, Dept. of Geography, 1976.
- Research paper (University of Chicago. Dept. of Geography) ; no. 158 .
Bibliography: p. 215-233.
73092655 //r84
Railroads -- United States -- Freight.--Railroads -- United States -- Freight.--Railroads -- United States -- Freight. Railroads -- Train load.--Railroads -- Train load.