Locklin, David Philip, 1897-
Economics of transportation. /
David Philip Locklin.
- 6th ed.
- Homewood, Ill. : R. D. Irwin, 1969.
- 882 p. 25 cm.
- The Irwin series in economics .
Transportation--United States.
Railroads--United States.
380.5 / LOE 1969